diff --git a/compose_viz/cli.py b/compose_viz/cli.py
index ffb10bd..618c6cc 100644
--- a/compose_viz/cli.py
+++ b/compose_viz/cli.py
@@ -4,8 +4,8 @@ import typer
 
 from compose_viz import __app_name__, __version__
 from compose_viz.graph import Graph
+from compose_viz.models.viz_formats import VizFormats
 from compose_viz.parser import Parser
-from compose_viz.viz_formats import VizFormats
 
 app = typer.Typer(
     invoke_without_command=True,
diff --git a/compose_viz/graph.py b/compose_viz/graph.py
index 32c5569..3f634f2 100644
--- a/compose_viz/graph.py
+++ b/compose_viz/graph.py
@@ -2,7 +2,7 @@ from typing import Optional
 
 import graphviz
 
-from compose_viz.compose import Compose
+from compose_viz.models.compose import Compose
 
 
 def apply_vertex_style(type) -> dict:
diff --git a/compose_viz/models/__init__.py b/compose_viz/models/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/compose_viz/compose.py b/compose_viz/models/compose.py
similarity index 81%
rename from compose_viz/compose.py
rename to compose_viz/models/compose.py
index 03e8f74..441b5e6 100644
--- a/compose_viz/compose.py
+++ b/compose_viz/models/compose.py
@@ -1,6 +1,6 @@
 from typing import List
 
-from compose_viz.service import Service
+from compose_viz.models.service import Service
 
 
 class Compose:
diff --git a/compose_viz/extends.py b/compose_viz/models/extends.py
similarity index 100%
rename from compose_viz/extends.py
rename to compose_viz/models/extends.py
diff --git a/compose_viz/port.py b/compose_viz/models/port.py
similarity index 100%
rename from compose_viz/port.py
rename to compose_viz/models/port.py
diff --git a/compose_viz/service.py b/compose_viz/models/service.py
similarity index 89%
rename from compose_viz/service.py
rename to compose_viz/models/service.py
index b1bf84b..89740ba 100644
--- a/compose_viz/service.py
+++ b/compose_viz/models/service.py
@@ -1,8 +1,8 @@
 from typing import List, Optional
 
-from compose_viz.extends import Extends
-from compose_viz.port import Port
-from compose_viz.volume import Volume
+from compose_viz.models.extends import Extends
+from compose_viz.models.port import Port
+from compose_viz.models.volume import Volume
 
 
 class Service:
diff --git a/compose_viz/viz_formats.py b/compose_viz/models/viz_formats.py
similarity index 100%
rename from compose_viz/viz_formats.py
rename to compose_viz/models/viz_formats.py
diff --git a/compose_viz/volume.py b/compose_viz/models/volume.py
similarity index 100%
rename from compose_viz/volume.py
rename to compose_viz/models/volume.py
diff --git a/compose_viz/parser.py b/compose_viz/parser.py
index 757d3ed..96e2667 100644
--- a/compose_viz/parser.py
+++ b/compose_viz/parser.py
@@ -3,10 +3,10 @@ from typing import Dict, List, Optional
 
 from ruamel.yaml import YAML
 
-from compose_viz.compose import Compose, Service
-from compose_viz.extends import Extends
-from compose_viz.port import Port, Protocol
-from compose_viz.volume import Volume, VolumeType
+from compose_viz.models.compose import Compose, Service
+from compose_viz.models.extends import Extends
+from compose_viz.models.port import Port, Protocol
+from compose_viz.models.volume import Volume, VolumeType
 
 
 class Parser:
diff --git a/compose_viz/spec/__init__.py b/compose_viz/spec/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/compose_viz/spec/compose-spec.json b/compose_viz/spec/compose-spec.json
new file mode 100644
index 0000000..d83dc2d
--- /dev/null
+++ b/compose_viz/spec/compose-spec.json
@@ -0,0 +1,813 @@
+{
+  "$schema": "http://json-schema.org/draft/2019-09/schema#",
+  "id": "compose_spec.json",
+  "type": "object",
+  "title": "Compose Specification",
+  "description": "The Compose file is a YAML file defining a multi-containers based application.",
+
+  "properties": {
+    "version": {
+      "type": "string",
+      "description": "declared for backward compatibility, ignored."
+    },
+
+    "name": {
+      "type": "string",
+      "description": "define the Compose project name, until user defines one explicitly."
+    },
+
+    "services": {
+      "id": "#/properties/services",
+      "type": "object",
+      "patternProperties": {
+        "^[a-zA-Z0-9._-]+$": {
+          "$ref": "#/definitions/service"
+        }
+      },
+      "additionalProperties": false
+    },
+
+    "networks": {
+      "id": "#/properties/networks",
+      "type": "object",
+      "patternProperties": {
+        "^[a-zA-Z0-9._-]+$": {
+          "$ref": "#/definitions/network"
+        }
+      }
+    },
+
+    "volumes": {
+      "id": "#/properties/volumes",
+      "type": "object",
+      "patternProperties": {
+        "^[a-zA-Z0-9._-]+$": {
+          "$ref": "#/definitions/volume"
+        }
+      },
+      "additionalProperties": false
+    },
+
+    "secrets": {
+      "id": "#/properties/secrets",
+      "type": "object",
+      "patternProperties": {
+        "^[a-zA-Z0-9._-]+$": {
+          "$ref": "#/definitions/secret"
+        }
+      },
+      "additionalProperties": false
+    },
+
+    "configs": {
+      "id": "#/properties/configs",
+      "type": "object",
+      "patternProperties": {
+        "^[a-zA-Z0-9._-]+$": {
+          "$ref": "#/definitions/config"
+        }
+      },
+      "additionalProperties": false
+    }
+  },
+
+  "patternProperties": {"^x-": {}},
+  "additionalProperties": false,
+
+  "definitions": {
+
+    "service": {
+      "id": "#/definitions/service",
+      "type": "object",
+
+      "properties": {
+        "deploy": {"$ref": "#/definitions/deployment"},
+        "build": {
+          "oneOf": [
+            {"type": "string"},
+            {
+              "type": "object",
+              "properties": {
+                "context": {"type": "string"},
+                "dockerfile": {"type": "string"},
+                "args": {"$ref": "#/definitions/list_or_dict"},
+                "ssh": {"$ref": "#/definitions/list_or_dict"},
+                "labels": {"$ref": "#/definitions/list_or_dict"},
+                "cache_from": {"type": "array", "items": {"type": "string"}},
+                "cache_to": {"type": "array", "items": {"type": "string"}},
+                "no_cache": {"type": "boolean"},
+                "network": {"type": "string"},
+                "pull": {"type": "boolean"},
+                "target": {"type": "string"},
+                "shm_size": {"type": ["integer", "string"]},
+                "extra_hosts": {"$ref": "#/definitions/list_or_dict"},
+                "isolation": {"type": "string"},
+                "secrets": {"$ref": "#/definitions/service_config_or_secret"},
+                "tags":{"type": "array", "items": {"type": "string"}}
+              },
+              "additionalProperties": false,
+              "patternProperties": {"^x-": {}}
+            }
+          ]
+        },
+        "blkio_config": {
+          "type": "object",
+          "properties": {
+            "device_read_bps": {
+              "type": "array",
+              "items": {"$ref": "#/definitions/blkio_limit"}
+            },
+            "device_read_iops": {
+              "type": "array",
+              "items": {"$ref": "#/definitions/blkio_limit"}
+            },
+            "device_write_bps": {
+              "type": "array",
+              "items": {"$ref": "#/definitions/blkio_limit"}
+            },
+            "device_write_iops": {
+              "type": "array",
+              "items": {"$ref": "#/definitions/blkio_limit"}
+            },
+            "weight": {"type": "integer"},
+            "weight_device": {
+              "type": "array",
+              "items": {"$ref": "#/definitions/blkio_weight"}
+            }
+          },
+          "additionalProperties": false
+        },
+        "cap_add": {"type": "array", "items": {"type": "string"}, "uniqueItems": true},
+        "cap_drop": {"type": "array", "items": {"type": "string"}, "uniqueItems": true},
+        "cgroup_parent": {"type": "string"},
+        "command": {
+          "oneOf": [
+            {"type": "string"},
+            {"type": "array", "items": {"type": "string"}}
+          ]
+        },
+        "configs": {"$ref": "#/definitions/service_config_or_secret"},
+        "container_name": {"type": "string"},
+        "cpu_count": {"type": "integer", "minimum": 0},
+        "cpu_percent": {"type": "integer", "minimum": 0, "maximum": 100},
+        "cpu_shares": {"type": ["number", "string"]},
+        "cpu_quota": {"type": ["number", "string"]},
+        "cpu_period": {"type": ["number", "string"]},
+        "cpu_rt_period": {"type": ["number", "string"]},
+        "cpu_rt_runtime": {"type": ["number", "string"]},
+        "cpus": {"type": ["number", "string"]},
+        "cpuset": {"type": "string"},
+        "credential_spec": {
+          "type": "object",
+          "properties": {
+            "config": {"type": "string"},
+            "file": {"type": "string"},
+            "registry": {"type": "string"}
+          },
+          "additionalProperties": false,
+          "patternProperties": {"^x-": {}}
+        },
+        "depends_on": {
+          "oneOf": [
+            {"$ref": "#/definitions/list_of_strings"},
+            {
+              "type": "object",
+              "additionalProperties": false,
+              "patternProperties": {
+                "^[a-zA-Z0-9._-]+$": {
+                  "type": "object",
+                  "additionalProperties": false,
+                  "properties": {
+                    "condition": {
+                      "type": "string",
+                      "enum": ["service_started", "service_healthy", "service_completed_successfully"]
+                    }
+                  },
+                  "required": ["condition"]
+                }
+              }
+            }
+          ]
+        },
+        "device_cgroup_rules": {"$ref": "#/definitions/list_of_strings"},
+        "devices": {"type": "array", "items": {"type": "string"}, "uniqueItems": true},
+        "dns": {"$ref": "#/definitions/string_or_list"},
+        "dns_opt": {"type": "array","items": {"type": "string"}, "uniqueItems": true},
+        "dns_search": {"$ref": "#/definitions/string_or_list"},
+        "domainname": {"type": "string"},
+        "entrypoint": {
+          "oneOf": [
+            {"type": "string"},
+            {"type": "array", "items": {"type": "string"}}
+          ]
+        },
+        "env_file": {"$ref": "#/definitions/string_or_list"},
+        "environment": {"$ref": "#/definitions/list_or_dict"},
+
+        "expose": {
+          "type": "array",
+          "items": {
+            "type": ["string", "number"],
+            "format": "expose"
+          },
+          "uniqueItems": true
+        },
+        "extends": {
+          "oneOf": [
+            {"type": "string"},
+            {
+              "type": "object",
+
+              "properties": {
+                "service": {"type": "string"},
+                "file": {"type": "string"}
+              },
+              "required": ["service"],
+              "additionalProperties": false
+            }
+          ]
+        },
+        "external_links": {"type": "array", "items": {"type": "string"}, "uniqueItems": true},
+        "extra_hosts": {"$ref": "#/definitions/list_or_dict"},
+        "group_add": {
+          "type": "array",
+          "items": {
+            "type": ["string", "number"]
+          },
+          "uniqueItems": true
+        },
+        "healthcheck": {"$ref": "#/definitions/healthcheck"},
+        "hostname": {"type": "string"},
+        "image": {"type": "string"},
+        "init": {"type": "boolean"},
+        "ipc": {"type": "string"},
+        "isolation": {"type": "string"},
+        "labels": {"$ref": "#/definitions/list_or_dict"},
+        "links": {"type": "array", "items": {"type": "string"}, "uniqueItems": true},
+        "logging": {
+          "type": "object",
+
+          "properties": {
+            "driver": {"type": "string"},
+            "options": {
+              "type": "object",
+              "patternProperties": {
+                "^.+$": {"type": ["string", "number", "null"]}
+              }
+            }
+          },
+          "additionalProperties": false,
+          "patternProperties": {"^x-": {}}
+        },
+        "mac_address": {"type": "string"},
+        "mem_limit": {"type": ["number", "string"]},
+        "mem_reservation": {"type": ["string", "integer"]},
+        "mem_swappiness": {"type": "integer"},
+        "memswap_limit": {"type": ["number", "string"]},
+        "network_mode": {"type": "string"},
+        "networks": {
+          "oneOf": [
+            {"$ref": "#/definitions/list_of_strings"},
+            {
+              "type": "object",
+              "patternProperties": {
+                "^[a-zA-Z0-9._-]+$": {
+                  "oneOf": [
+                    {
+                      "type": "object",
+                      "properties": {
+                        "aliases": {"$ref": "#/definitions/list_of_strings"},
+                        "ipv4_address": {"type": "string"},
+                        "ipv6_address": {"type": "string"},
+                        "link_local_ips": {"$ref": "#/definitions/list_of_strings"},
+                        "priority": {"type": "number"}
+                      },
+                      "additionalProperties": false,
+                      "patternProperties": {"^x-": {}}
+                    },
+                    {"type": "null"}
+                  ]
+                }
+              },
+              "additionalProperties": false
+            }
+          ]
+        },
+        "oom_kill_disable": {"type": "boolean"},
+        "oom_score_adj": {"type": "integer", "minimum": -1000, "maximum": 1000},
+        "pid": {"type": ["string", "null"]},
+        "pids_limit": {"type": ["number", "string"]},
+        "platform": {"type": "string"},
+        "ports": {
+          "type": "array",
+          "items": {
+            "oneOf": [
+              {"type": "number", "format": "ports"},
+              {"type": "string", "format": "ports"},
+              {
+                "type": "object",
+                "properties": {
+                  "mode": {"type": "string"},
+                  "host_ip": {"type": "string"},
+                  "target": {"type": "integer"},
+                  "published": {"type": ["string", "integer"]},
+                  "protocol": {"type": "string"}
+                },
+                "additionalProperties": false,
+                "patternProperties": {"^x-": {}}
+              }
+            ]
+          },
+          "uniqueItems": true
+        },
+        "privileged": {"type": "boolean"},
+        "profiles": {"$ref": "#/definitions/list_of_strings"},
+        "pull_policy": {"type": "string", "enum": [
+          "always", "never", "if_not_present", "build", "missing"
+        ]},
+        "read_only": {"type": "boolean"},
+        "restart": {"type": "string"},
+        "runtime": {
+          "type": "string"
+        },
+        "scale": {
+          "type": "integer"
+        },
+        "security_opt": {"type": "array", "items": {"type": "string"}, "uniqueItems": true},
+        "shm_size": {"type": ["number", "string"]},
+        "secrets": {"$ref": "#/definitions/service_config_or_secret"},
+        "sysctls": {"$ref": "#/definitions/list_or_dict"},
+        "stdin_open": {"type": "boolean"},
+        "stop_grace_period": {"type": "string", "format": "duration"},
+        "stop_signal": {"type": "string"},
+        "storage_opt": {"type": "object"},
+        "tmpfs": {"$ref": "#/definitions/string_or_list"},
+        "tty": {"type": "boolean"},
+        "ulimits": {
+          "type": "object",
+          "patternProperties": {
+            "^[a-z]+$": {
+              "oneOf": [
+                {"type": "integer"},
+                {
+                  "type": "object",
+                  "properties": {
+                    "hard": {"type": "integer"},
+                    "soft": {"type": "integer"}
+                  },
+                  "required": ["soft", "hard"],
+                  "additionalProperties": false,
+                  "patternProperties": {"^x-": {}}
+                }
+              ]
+            }
+          }
+        },
+        "user": {"type": "string"},
+        "userns_mode": {"type": "string"},
+        "volumes": {
+          "type": "array",
+          "items": {
+            "oneOf": [
+              {"type": "string"},
+              {
+                "type": "object",
+                "required": ["type"],
+                "properties": {
+                  "type": {"type": "string"},
+                  "source": {"type": "string"},
+                  "target": {"type": "string"},
+                  "read_only": {"type": "boolean"},
+                  "consistency": {"type": "string"},
+                  "bind": {
+                    "type": "object",
+                    "properties": {
+                      "propagation": {"type": "string"},
+                      "create_host_path": {"type": "boolean"},
+                      "selinux": {"type": "string", "enum": ["z", "Z"]}
+                    },
+                    "additionalProperties": false,
+                    "patternProperties": {"^x-": {}}
+                  },
+                  "volume": {
+                    "type": "object",
+                    "properties": {
+                      "nocopy": {"type": "boolean"}
+                    },
+                    "additionalProperties": false,
+                    "patternProperties": {"^x-": {}}
+                  },
+                  "tmpfs": {
+                    "type": "object",
+                    "properties": {
+                      "size": {
+                        "oneOf": [
+                          {"type": "integer", "minimum": 0},
+                          {"type": "string"}
+                        ]
+                      },
+                      "mode": {"type": "number"}
+                    },
+                    "additionalProperties": false,
+                    "patternProperties": {"^x-": {}}
+                  }
+                },
+                "additionalProperties": false,
+                "patternProperties": {"^x-": {}}
+              }
+            ]
+          },
+          "uniqueItems": true
+        },
+        "volumes_from": {
+          "type": "array",
+          "items": {"type": "string"},
+          "uniqueItems": true
+        },
+        "working_dir": {"type": "string"}
+      },
+      "patternProperties": {"^x-": {}},
+      "additionalProperties": false
+    },
+
+    "healthcheck": {
+      "id": "#/definitions/healthcheck",
+      "type": "object",
+      "properties": {
+        "disable": {"type": "boolean"},
+        "interval": {"type": "string", "format": "duration"},
+        "retries": {"type": "number"},
+        "test": {
+          "oneOf": [
+            {"type": "string"},
+            {"type": "array", "items": {"type": "string"}}
+          ]
+        },
+        "timeout": {"type": "string", "format": "duration"},
+        "start_period": {"type": "string", "format": "duration"}
+      },
+      "additionalProperties": false,
+      "patternProperties": {"^x-": {}}
+    },
+    "deployment": {
+      "id": "#/definitions/deployment",
+      "type": ["object", "null"],
+      "properties": {
+        "mode": {"type": "string"},
+        "endpoint_mode": {"type": "string"},
+        "replicas": {"type": "integer"},
+        "labels": {"$ref": "#/definitions/list_or_dict"},
+        "rollback_config": {
+          "type": "object",
+          "properties": {
+            "parallelism": {"type": "integer"},
+            "delay": {"type": "string", "format": "duration"},
+            "failure_action": {"type": "string"},
+            "monitor": {"type": "string", "format": "duration"},
+            "max_failure_ratio": {"type": "number"},
+            "order": {"type": "string", "enum": [
+              "start-first", "stop-first"
+            ]}
+          },
+          "additionalProperties": false,
+          "patternProperties": {"^x-": {}}
+        },
+        "update_config": {
+          "type": "object",
+          "properties": {
+            "parallelism": {"type": "integer"},
+            "delay": {"type": "string", "format": "duration"},
+            "failure_action": {"type": "string"},
+            "monitor": {"type": "string", "format": "duration"},
+            "max_failure_ratio": {"type": "number"},
+            "order": {"type": "string", "enum": [
+              "start-first", "stop-first"
+            ]}
+          },
+          "additionalProperties": false,
+          "patternProperties": {"^x-": {}}
+        },
+        "resources": {
+          "type": "object",
+          "properties": {
+            "limits": {
+              "type": "object",
+              "properties": {
+                "cpus": {"type": ["number", "string"]},
+                "memory": {"type": "string"},
+                "pids": {"type": "integer"}
+              },
+              "additionalProperties": false,
+              "patternProperties": {"^x-": {}}
+            },
+            "reservations": {
+              "type": "object",
+              "properties": {
+                "cpus": {"type": ["number", "string"]},
+                "memory": {"type": "string"},
+                "generic_resources": {"$ref": "#/definitions/generic_resources"},
+                "devices": {"$ref": "#/definitions/devices"}
+              },
+              "additionalProperties": false,
+              "patternProperties": {"^x-": {}}
+            }
+          },
+          "additionalProperties": false,
+          "patternProperties": {"^x-": {}}
+        },
+        "restart_policy": {
+          "type": "object",
+          "properties": {
+            "condition": {"type": "string"},
+            "delay": {"type": "string", "format": "duration"},
+            "max_attempts": {"type": "integer"},
+            "window": {"type": "string", "format": "duration"}
+          },
+          "additionalProperties": false,
+          "patternProperties": {"^x-": {}}
+        },
+        "placement": {
+          "type": "object",
+          "properties": {
+            "constraints": {"type": "array", "items": {"type": "string"}},
+            "preferences": {
+              "type": "array",
+              "items": {
+                "type": "object",
+                "properties": {
+                  "spread": {"type": "string"}
+                },
+                "additionalProperties": false,
+                "patternProperties": {"^x-": {}}
+              }
+            },
+            "max_replicas_per_node": {"type": "integer"}
+          },
+          "additionalProperties": false,
+          "patternProperties": {"^x-": {}}
+        }
+      },
+      "additionalProperties": false,
+      "patternProperties": {"^x-": {}}
+    },
+
+    "generic_resources": {
+      "id": "#/definitions/generic_resources",
+      "type": "array",
+      "items": {
+        "type": "object",
+        "properties": {
+          "discrete_resource_spec": {
+            "type": "object",
+            "properties": {
+              "kind": {"type": "string"},
+              "value": {"type": "number"}
+            },
+            "additionalProperties": false,
+            "patternProperties": {"^x-": {}}
+          }
+        },
+        "additionalProperties": false,
+        "patternProperties": {"^x-": {}}
+      }
+    },
+
+    "devices": {
+      "id": "#/definitions/devices",
+      "type": "array",
+      "items": {
+        "type": "object",
+        "properties": {
+            "capabilities": {"$ref": "#/definitions/list_of_strings"},
+            "count": {"type": ["string", "integer"]},
+            "device_ids": {"$ref": "#/definitions/list_of_strings"},
+            "driver":{"type": "string"},
+            "options":{"$ref": "#/definitions/list_or_dict"}
+          },
+        "additionalProperties": false,
+        "patternProperties": {"^x-": {}}
+      }
+    },
+
+    "network": {
+      "id": "#/definitions/network",
+      "type": ["object", "null"],
+      "properties": {
+        "name": {"type": "string"},
+        "driver": {"type": "string"},
+        "driver_opts": {
+          "type": "object",
+          "patternProperties": {
+            "^.+$": {"type": ["string", "number"]}
+          }
+        },
+        "ipam": {
+          "type": "object",
+          "properties": {
+            "driver": {"type": "string"},
+            "config": {
+              "type": "array",
+              "items": {
+                "type": "object",
+                "properties": {
+                  "subnet": {"type": "string", "format": "subnet_ip_address"},
+                  "ip_range": {"type": "string"},
+                  "gateway": {"type": "string"},
+                  "aux_addresses": {
+                    "type": "object",
+                    "additionalProperties": false,
+                    "patternProperties": {"^.+$": {"type": "string"}}
+                  }
+                },
+                "additionalProperties": false,
+                "patternProperties": {"^x-": {}}
+              }
+            },
+            "options": {
+              "type": "object",
+              "additionalProperties": false,
+              "patternProperties": {"^.+$": {"type": "string"}}
+            }
+          },
+          "additionalProperties": false,
+          "patternProperties": {"^x-": {}}
+        },
+        "external": {
+          "type": ["boolean", "object"],
+          "properties": {
+            "name": {
+              "deprecated": true,
+              "type": "string"
+            }
+          },
+          "additionalProperties": false,
+          "patternProperties": {"^x-": {}}
+        },
+        "internal": {"type": "boolean"},
+        "enable_ipv6": {"type": "boolean"},
+        "attachable": {"type": "boolean"},
+        "labels": {"$ref": "#/definitions/list_or_dict"}
+      },
+      "additionalProperties": false,
+      "patternProperties": {"^x-": {}}
+    },
+
+    "volume": {
+      "id": "#/definitions/volume",
+      "type": ["object", "null"],
+      "properties": {
+        "name": {"type": "string"},
+        "driver": {"type": "string"},
+        "driver_opts": {
+          "type": "object",
+          "patternProperties": {
+            "^.+$": {"type": ["string", "number"]}
+          }
+        },
+        "external": {
+          "type": ["boolean", "object"],
+          "properties": {
+            "name": {
+              "deprecated": true,
+              "type": "string"
+            }
+          },
+          "additionalProperties": false,
+          "patternProperties": {"^x-": {}}
+        },
+        "labels": {"$ref": "#/definitions/list_or_dict"}
+      },
+      "additionalProperties": false,
+      "patternProperties": {"^x-": {}}
+    },
+
+    "secret": {
+      "id": "#/definitions/secret",
+      "type": "object",
+      "properties": {
+        "name": {"type": "string"},
+        "file": {"type": "string"},
+        "external": {
+          "type": ["boolean", "object"],
+          "properties": {
+            "name": {"type": "string"}
+          }
+        },
+        "labels": {"$ref": "#/definitions/list_or_dict"},
+        "driver": {"type": "string"},
+        "driver_opts": {
+          "type": "object",
+          "patternProperties": {
+            "^.+$": {"type": ["string", "number"]}
+          }
+        },
+        "template_driver": {"type": "string"}
+      },
+      "additionalProperties": false,
+      "patternProperties": {"^x-": {}}
+    },
+
+    "config": {
+      "id": "#/definitions/config",
+      "type": "object",
+      "properties": {
+        "name": {"type": "string"},
+        "file": {"type": "string"},
+        "external": {
+          "type": ["boolean", "object"],
+          "properties": {
+            "name": {
+              "deprecated": true,
+              "type": "string"
+            }
+          }
+        },
+        "labels": {"$ref": "#/definitions/list_or_dict"},
+        "template_driver": {"type": "string"}
+      },
+      "additionalProperties": false,
+      "patternProperties": {"^x-": {}}
+    },
+
+    "string_or_list": {
+      "oneOf": [
+        {"type": "string"},
+        {"$ref": "#/definitions/list_of_strings"}
+      ]
+    },
+
+    "list_of_strings": {
+      "type": "array",
+      "items": {"type": "string"},
+      "uniqueItems": true
+    },
+
+    "list_or_dict": {
+      "oneOf": [
+        {
+          "type": "object",
+          "patternProperties": {
+            ".+": {
+              "type": ["string", "number", "boolean", "null"]
+            }
+          },
+          "additionalProperties": false
+        },
+        {"type": "array", "items": {"type": "string"}, "uniqueItems": true}
+      ]
+    },
+
+    "blkio_limit": {
+      "type": "object",
+      "properties": {
+        "path": {"type": "string"},
+        "rate": {"type": ["integer", "string"]}
+      },
+      "additionalProperties": false
+    },
+    "blkio_weight": {
+      "type": "object",
+      "properties": {
+        "path": {"type": "string"},
+        "weight": {"type": "integer"}
+      },
+      "additionalProperties": false
+    },
+
+    "service_config_or_secret": {
+      "type": "array",
+      "items": {
+        "oneOf": [
+          {"type": "string"},
+          {
+            "type": "object",
+            "properties": {
+              "source": {"type": "string"},
+              "target": {"type": "string"},
+              "uid": {"type": "string"},
+              "gid": {"type": "string"},
+              "mode": {"type": "number"}
+            },
+            "additionalProperties": false,
+            "patternProperties": {"^x-": {}}
+          }
+        ]
+      }
+    },
+
+    "constraints": {
+      "service": {
+        "id": "#/definitions/constraints/service",
+        "anyOf": [
+          {"required": ["build"]},
+          {"required": ["image"]}
+        ],
+        "properties": {
+          "build": {
+            "required": ["context"]
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/compose_viz/spec/compose_spec.py b/compose_viz/spec/compose_spec.py
new file mode 100644
index 0000000..0880ac6
--- /dev/null
+++ b/compose_viz/spec/compose_spec.py
@@ -0,0 +1,550 @@
+# generated by datamodel-codegen:
+#   filename:  compose-spec.json
+#   timestamp: 2022-05-27T05:44:40+00:00
+
+from __future__ import annotations
+
+from enum import Enum
+from typing import Any, Dict, List, Optional, Union
+
+from pydantic import BaseModel, Extra, Field, conint, constr
+
+
+class CredentialSpec(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    config: Optional[str] = None
+    file: Optional[str] = None
+    registry: Optional[str] = None
+
+
+class Condition(Enum):
+    service_started = "service_started"
+    service_healthy = "service_healthy"
+    service_completed_successfully = "service_completed_successfully"
+
+
+class DependsOn(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    condition: Condition
+
+
+class Extend(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    service: str
+    file: Optional[str] = None
+
+
+class Logging(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    driver: Optional[str] = None
+    options: Optional[Dict[constr(regex=r"^.+$"), Optional[Union[str, float]]]] = None  # type: ignore  # noqa: F722
+
+
+class Port(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    mode: Optional[str] = None
+    host_ip: Optional[str] = None
+    target: Optional[int] = None
+    published: Optional[Union[str, int]] = None
+    protocol: Optional[str] = None
+
+
+class PullPolicy(Enum):
+    always = "always"
+    never = "never"
+    if_not_present = "if_not_present"
+    build = "build"
+    missing = "missing"
+
+
+class Ulimit(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    hard: int
+    soft: int
+
+
+class Selinux(Enum):
+    z = "z"
+    Z = "Z"
+
+
+class Bind(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    propagation: Optional[str] = None
+    create_host_path: Optional[bool] = None
+    selinux: Optional[Selinux] = None
+
+
+class AdditionalVolumeOption(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    nocopy: Optional[bool] = None
+
+
+class Tmpfs(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    size: Optional[Union[conint(ge=0), str]] = None  # type: ignore
+    mode: Optional[float] = None
+
+
+class ServiceVolume(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    type: str
+    source: Optional[str] = None
+    target: Optional[str] = None
+    read_only: Optional[bool] = None
+    consistency: Optional[str] = None
+    bind: Optional[Bind] = None
+    volume: Optional[AdditionalVolumeOption] = None
+    tmpfs: Optional[Tmpfs] = None
+
+
+class Healthcheck(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    disable: Optional[bool] = None
+    interval: Optional[str] = None
+    retries: Optional[float] = None
+    test: Optional[Union[str, List[str]]] = None
+    timeout: Optional[str] = None
+    start_period: Optional[str] = None
+
+
+class Order(Enum):
+    start_first = "start-first"
+    stop_first = "stop-first"
+
+
+class RollbackConfig(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    parallelism: Optional[int] = None
+    delay: Optional[str] = None
+    failure_action: Optional[str] = None
+    monitor: Optional[str] = None
+    max_failure_ratio: Optional[float] = None
+    order: Optional[Order] = None
+
+
+class ConfigOrder(Enum):
+    start_first = "start-first"
+    stop_first = "stop-first"
+
+
+class UpdateConfig(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    parallelism: Optional[int] = None
+    delay: Optional[str] = None
+    failure_action: Optional[str] = None
+    monitor: Optional[str] = None
+    max_failure_ratio: Optional[float] = None
+    order: Optional[ConfigOrder] = None
+
+
+class Limits(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    cpus: Optional[Union[float, str]] = None
+    memory: Optional[str] = None
+    pids: Optional[int] = None
+
+
+class RestartPolicy(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    condition: Optional[str] = None
+    delay: Optional[str] = None
+    max_attempts: Optional[int] = None
+    window: Optional[str] = None
+
+
+class Preference(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    spread: Optional[str] = None
+
+
+class Placement(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    constraints: Optional[List[str]] = None
+    preferences: Optional[List[Preference]] = None
+    max_replicas_per_node: Optional[int] = None
+
+
+class DiscreteResourceSpec(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    kind: Optional[str] = None
+    value: Optional[float] = None
+
+
+class GenericResource(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    discrete_resource_spec: Optional[DiscreteResourceSpec] = None
+
+
+class GenericResources(BaseModel):
+    __root__: List[GenericResource]
+
+
+class ConfigItem(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    subnet: Optional[str] = None
+    ip_range: Optional[str] = None
+    gateway: Optional[str] = None
+    aux_addresses: Optional[Dict[constr(regex=r"^.+$"), str]] = None  # type: ignore  # noqa: F722
+
+
+class Ipam(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    driver: Optional[str] = None
+    config: Optional[List[ConfigItem]] = None
+    options: Optional[Dict[constr(regex=r"^.+$"), str]] = None  # type: ignore  # noqa: F722
+
+
+class ExternalNetwork(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    name: Optional[str] = None
+
+
+class ExternalVolume(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    name: Optional[str] = None
+
+
+class ExternalSecret(BaseModel):
+    name: Optional[str] = None
+
+
+class ExternalConfig(BaseModel):
+    name: Optional[str] = None
+
+
+class ListOfStrings(BaseModel):
+    __root__: List[str] = Field(..., unique_items=True)
+
+
+class ListOrDict(BaseModel):
+    __root__: Union[Dict[constr(regex=r".+"), Optional[Union[str, float, bool]]], List[str]]  # type: ignore  # noqa: F722, E501
+
+
+class BlkioLimit(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    path: Optional[str] = None
+    rate: Optional[Union[int, str]] = None
+
+
+class BlkioWeight(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    path: Optional[str] = None
+    weight: Optional[int] = None
+
+
+class ServiceConfigOrSecretItem(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    source: Optional[str] = None
+    target: Optional[str] = None
+    uid: Optional[str] = None
+    gid: Optional[str] = None
+    mode: Optional[float] = None
+
+
+class ServiceConfigOrSecret(BaseModel):
+    __root__: List[Union[str, ServiceConfigOrSecretItem]]
+
+
+class Constraints(BaseModel):
+    __root__: Any
+
+
+class BuildItem(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    context: Optional[str] = None
+    dockerfile: Optional[str] = None
+    args: Optional[ListOrDict] = None
+    ssh: Optional[ListOrDict] = None
+    labels: Optional[ListOrDict] = None
+    cache_from: Optional[List[str]] = None
+    cache_to: Optional[List[str]] = None
+    no_cache: Optional[bool] = None
+    network: Optional[str] = None
+    pull: Optional[bool] = None
+    target: Optional[str] = None
+    shm_size: Optional[Union[int, str]] = None
+    extra_hosts: Optional[ListOrDict] = None
+    isolation: Optional[str] = None
+    secrets: Optional[ServiceConfigOrSecret] = None
+    tags: Optional[List[str]] = None
+
+
+class BlkioConfig(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    device_read_bps: Optional[List[BlkioLimit]] = None
+    device_read_iops: Optional[List[BlkioLimit]] = None
+    device_write_bps: Optional[List[BlkioLimit]] = None
+    device_write_iops: Optional[List[BlkioLimit]] = None
+    weight: Optional[int] = None
+    weight_device: Optional[List[BlkioWeight]] = None
+
+
+class ServiceNetwork(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    aliases: Optional[ListOfStrings] = None
+    ipv4_address: Optional[str] = None
+    ipv6_address: Optional[str] = None
+    link_local_ips: Optional[ListOfStrings] = None
+    priority: Optional[float] = None
+
+
+class Device(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    capabilities: Optional[ListOfStrings] = None
+    count: Optional[Union[str, int]] = None
+    device_ids: Optional[ListOfStrings] = None
+    driver: Optional[str] = None
+    options: Optional[ListOrDict] = None
+
+
+class Devices(BaseModel):
+    __root__: List[Device]
+
+
+class Network(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    name: Optional[str] = None
+    driver: Optional[str] = None
+    driver_opts: Optional[Dict[constr(regex=r"^.+$"), Union[str, float]]] = None  # type: ignore  # noqa: F722
+    ipam: Optional[Ipam] = None
+    external: Optional[ExternalNetwork] = None
+    internal: Optional[bool] = None
+    enable_ipv6: Optional[bool] = None
+    attachable: Optional[bool] = None
+    labels: Optional[ListOrDict] = None
+
+
+class Volume(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    name: Optional[str] = None
+    driver: Optional[str] = None
+    driver_opts: Optional[Dict[constr(regex=r"^.+$"), Union[str, float]]] = None  # type: ignore  # noqa: F722
+    external: Optional[ExternalVolume] = None
+    labels: Optional[ListOrDict] = None
+
+
+class Secret(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    name: Optional[str] = None
+    file: Optional[str] = None
+    external: Optional[ExternalSecret] = None
+    labels: Optional[ListOrDict] = None
+    driver: Optional[str] = None
+    driver_opts: Optional[Dict[constr(regex=r"^.+$"), Union[str, float]]] = None  # type: ignore  # noqa: F722
+    template_driver: Optional[str] = None
+
+
+class Config(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    name: Optional[str] = None
+    file: Optional[str] = None
+    external: Optional[ExternalConfig] = None
+    labels: Optional[ListOrDict] = None
+    template_driver: Optional[str] = None
+
+
+class StringOrList(BaseModel):
+    __root__: Union[str, ListOfStrings]
+
+
+class Reservations(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    cpus: Optional[Union[float, str]] = None
+    memory: Optional[str] = None
+    generic_resources: Optional[GenericResources] = None
+    devices: Optional[Devices] = None
+
+
+class Resources(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    limits: Optional[Limits] = None
+    reservations: Optional[Reservations] = None
+
+
+class Deployment(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    mode: Optional[str] = None
+    endpoint_mode: Optional[str] = None
+    replicas: Optional[int] = None
+    labels: Optional[ListOrDict] = None
+    rollback_config: Optional[RollbackConfig] = None
+    update_config: Optional[UpdateConfig] = None
+    resources: Optional[Resources] = None
+    restart_policy: Optional[RestartPolicy] = None
+    placement: Optional[Placement] = None
+
+
+class Service(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    deploy: Optional[Deployment] = None
+    build: Optional[Union[str, BuildItem]] = None
+    blkio_config: Optional[BlkioConfig] = None
+    cap_add: Optional[List[str]] = Field(None, unique_items=True)
+    cap_drop: Optional[List[str]] = Field(None, unique_items=True)
+    cgroup_parent: Optional[str] = None
+    command: Optional[Union[str, List[str]]] = None
+    configs: Optional[ServiceConfigOrSecret] = None
+    container_name: Optional[str] = None
+    cpu_count: Optional[conint(ge=0)] = None  # type: ignore
+    cpu_percent: Optional[conint(ge=0, le=100)] = None  # type: ignore
+    cpu_shares: Optional[Union[float, str]] = None
+    cpu_quota: Optional[Union[float, str]] = None
+    cpu_period: Optional[Union[float, str]] = None
+    cpu_rt_period: Optional[Union[float, str]] = None
+    cpu_rt_runtime: Optional[Union[float, str]] = None
+    cpus: Optional[Union[float, str]] = None
+    cpuset: Optional[str] = None
+    credential_spec: Optional[CredentialSpec] = None
+    depends_on: Optional[Union[ListOfStrings, Dict[constr(regex=r"^[a-zA-Z0-9._-]+$"), DependsOn]]] = None  # type: ignore  # noqa: F722, E501
+    device_cgroup_rules: Optional[ListOfStrings] = None
+    devices: Optional[List[str]] = Field(None, unique_items=True)
+    dns: Optional[StringOrList] = None
+    dns_opt: Optional[List[str]] = Field(None, unique_items=True)
+    dns_search: Optional[StringOrList] = None
+    domainname: Optional[str] = None
+    entrypoint: Optional[Union[str, List[str]]] = None
+    env_file: Optional[StringOrList] = None
+    environment: Optional[ListOrDict] = None
+    expose: Optional[List[Union[str, float]]] = Field(None, unique_items=True)
+    extends: Optional[Union[str, Extend]] = None
+    external_links: Optional[List[str]] = Field(None, unique_items=True)
+    extra_hosts: Optional[ListOrDict] = None
+    group_add: Optional[List[Union[str, float]]] = Field(None, unique_items=True)
+    healthcheck: Optional[Healthcheck] = None
+    hostname: Optional[str] = None
+    image: Optional[str] = None
+    init: Optional[bool] = None
+    ipc: Optional[str] = None
+    isolation: Optional[str] = None
+    labels: Optional[ListOrDict] = None
+    links: Optional[List[str]] = Field(None, unique_items=True)
+    logging: Optional[Logging] = None
+    mac_address: Optional[str] = None
+    mem_limit: Optional[Union[float, str]] = None
+    mem_reservation: Optional[Union[str, int]] = None
+    mem_swappiness: Optional[int] = None
+    memswap_limit: Optional[Union[float, str]] = None
+    network_mode: Optional[str] = None
+    networks: Optional[Union[ListOfStrings, Dict[constr(regex=r"^[a-zA-Z0-9._-]+$"), Optional[ServiceNetwork]]]] = None  # type: ignore  # noqa: F722, E501
+    oom_kill_disable: Optional[bool] = None
+    oom_score_adj: Optional[conint(ge=-1000, le=1000)] = None  # type: ignore
+    pid: Optional[Optional[str]] = None
+    pids_limit: Optional[Union[float, str]] = None
+    platform: Optional[str] = None
+    ports: Optional[List[Union[float, str, Port]]] = Field(None, unique_items=True)
+    privileged: Optional[bool] = None
+    profiles: Optional[ListOfStrings] = None
+    pull_policy: Optional[PullPolicy] = None
+    read_only: Optional[bool] = None
+    restart: Optional[str] = None
+    runtime: Optional[str] = None
+    scale: Optional[int] = None
+    security_opt: Optional[List[str]] = Field(None, unique_items=True)
+    shm_size: Optional[Union[float, str]] = None
+    secrets: Optional[ServiceConfigOrSecret] = None
+    sysctls: Optional[ListOrDict] = None
+    stdin_open: Optional[bool] = None
+    stop_grace_period: Optional[str] = None
+    stop_signal: Optional[str] = None
+    storage_opt: Optional[Dict[str, Any]] = None
+    tmpfs: Optional[StringOrList] = None
+    tty: Optional[bool] = None
+    ulimits: Optional[Dict[constr(regex=r"^[a-z]+$"), Union[int, Ulimit]]] = None  # type: ignore  # noqa: F722
+    user: Optional[str] = None
+    userns_mode: Optional[str] = None
+    volumes: Optional[List[Union[str, ServiceVolume]]] = Field(None, unique_items=True)
+    volumes_from: Optional[List[str]] = Field(None, unique_items=True)
+    working_dir: Optional[str] = None
+
+
+class ComposeSpecification(BaseModel):
+    class Config:
+        extra = Extra.forbid
+
+    version: Optional[str] = Field(None, description="declared for backward compatibility, ignored.")
+    name: Optional[str] = Field(
+        None,
+        description="define the Compose project name, until user defines one explicitly.",
+    )
+    services: Optional[Dict[constr(regex=r"^[a-zA-Z0-9._-]+$"), Service]] = None  # type: ignore  # noqa: F722
+    networks: Optional[Dict[constr(regex=r"^[a-zA-Z0-9._-]+$"), Network]] = None  # type: ignore  # noqa: F722
+    volumes: Optional[Dict[constr(regex=r"^[a-zA-Z0-9._-]+$"), Volume]] = None  # type: ignore  # noqa: F722
+    secrets: Optional[Dict[constr(regex=r"^[a-zA-Z0-9._-]+$"), Secret]] = None  # type: ignore  # noqa: F722
+    configs: Optional[Dict[constr(regex=r"^[a-zA-Z0-9._-]+$"), Config]] = None  # type: ignore  # noqa: F722
diff --git a/pyproject.toml b/pyproject.toml
index 4ba3c53..f71b239 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,3 +30,7 @@ build-backend = "poetry.core.masonry.api"
 
 [tool.poetry.scripts]
 cpv = "compose_viz.cli:start_cli"
+
+[tool.coverage.run]
+source = ["compose_viz"]
+omit = ["compose_viz/spec/*"]
diff --git a/tests/test_extends.py b/tests/test_extends.py
index ad7e4c5..d54cd5d 100644
--- a/tests/test_extends.py
+++ b/tests/test_extends.py
@@ -1,6 +1,6 @@
 import pytest
 
-from compose_viz.extends import Extends
+from compose_viz.models.extends import Extends
 
 
 def test_extend_init_normal() -> None:
diff --git a/tests/test_parse_file.py b/tests/test_parse_file.py
index f384789..2dfd0d8 100644
--- a/tests/test_parse_file.py
+++ b/tests/test_parse_file.py
@@ -1,11 +1,11 @@
 import pytest
 
-from compose_viz.compose import Compose
-from compose_viz.extends import Extends
+from compose_viz.models.compose import Compose
+from compose_viz.models.extends import Extends
+from compose_viz.models.port import Port, Protocol
+from compose_viz.models.service import Service
+from compose_viz.models.volume import Volume, VolumeType
 from compose_viz.parser import Parser
-from compose_viz.port import Port, Protocol
-from compose_viz.service import Service
-from compose_viz.volume import Volume, VolumeType
 
 
 @pytest.mark.parametrize(
diff --git a/tests/test_port.py b/tests/test_port.py
index 159c92c..6a2afcb 100644
--- a/tests/test_port.py
+++ b/tests/test_port.py
@@ -1,4 +1,4 @@
-from compose_viz.port import Port, Protocol
+from compose_viz.models.port import Port, Protocol
 
 
 def test_port_init_normal() -> None:
diff --git a/tests/test_volume.py b/tests/test_volume.py
index b3651ec..5e9cf9c 100644
--- a/tests/test_volume.py
+++ b/tests/test_volume.py
@@ -1,4 +1,4 @@
-from compose_viz.volume import Volume, VolumeType
+from compose_viz.models.volume import Volume, VolumeType
 
 
 def test_volume_init_normal() -> None: