diff --git a/schema/definitions.json b/schema/definitions.json
index c4b72d32..2f2c68da 100644
--- a/schema/definitions.json
+++ b/schema/definitions.json
@@ -143,7 +143,7 @@
           "additionalProperties": false,
           "properties": {
             "custom": {
-              "$ref": "plugin/custom.json"
+              "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/plugin/custom.json"
             }
           },
           "required": ["custom"]
@@ -153,7 +153,7 @@
           "additionalProperties": false,
           "properties": {
             "akeneo": {
-              "$ref": "plugin/akeneo.json"
+              "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/plugin/akeneo.json"
             }
           },
           "required": ["akeneo"]
@@ -163,7 +163,7 @@
           "additionalProperties": false,
           "properties": {
             "sylius": {
-              "$ref": "plugin/sylius.json"
+              "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/plugin/sylius.json"
             }
           },
           "required": ["sylius"]
@@ -173,7 +173,7 @@
           "additionalProperties": false,
           "properties": {
             "csv": {
-              "$ref": "plugin/csv.json"
+              "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/plugin/csv.json"
             }
           },
           "required": ["csv"]
@@ -183,7 +183,7 @@
           "additionalProperties": false,
           "properties": {
             "spreadsheet": {
-              "$ref": "plugin/spreadsheet.json"
+              "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/plugin/spreadsheet.json"
             }
           },
           "required": ["spreadsheet"]
@@ -193,7 +193,7 @@
           "additionalProperties": false,
           "properties": {
             "fastmap": {
-              "$ref": "plugin/fastmap.json"
+              "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/plugin/fastmap.json"
             }
           },
           "required": ["fastmap"]
@@ -203,7 +203,7 @@
           "additionalProperties": false,
           "properties": {
             "stream": {
-              "$ref": "plugin/stream.json"
+              "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/plugin/stream.json"
             }
           },
           "required": ["stream"]
@@ -213,7 +213,7 @@
           "additionalProperties": false,
           "properties": {
             "batch": {
-              "$ref": "plugin/batch.json"
+              "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/plugin/batch.json"
             }
           },
           "required": ["batch"]
@@ -223,7 +223,7 @@
           "additionalProperties": false,
           "properties": {
             "ftp": {
-              "$ref": "plugin/ftp.json"
+              "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/plugin/ftp.json"
             }
           },
           "required": ["ftp"]
@@ -233,7 +233,7 @@
           "additionalProperties": false,
           "properties": {
             "http": {
-              "$ref": "plugin/http.json"
+              "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/plugin/http.json"
             }
           },
           "required": ["http"]
@@ -243,7 +243,7 @@
           "additionalProperties": false,
           "properties": {
             "sftp": {
-              "$ref": "plugin/sftp.json"
+              "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/plugin/sftp.json"
             }
           },
           "required": ["sftp"]
@@ -253,7 +253,7 @@
           "additionalProperties": false,
           "properties": {
             "sql": {
-              "$ref": "plugin/sql.json"
+              "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/plugin/sql.json"
             }
           },
           "required": ["sql"]
@@ -263,7 +263,7 @@
           "additionalProperties": false,
           "properties": {
             "json": {
-              "$ref": "plugin/json.json"
+              "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/plugin/json.json"
             }
           },
           "required": ["json"]
diff --git a/schema/expressions.json b/schema/expressions.json
index 81172e07..8abec5a1 100644
--- a/schema/expressions.json
+++ b/schema/expressions.json
@@ -54,6 +54,21 @@
         { "type": "number" }
       ]
     },
+    "expression-or-boolean": {
+      "oneOf": [
+        { "$ref": "#/$defs/bundled-expression" },
+        { "type": "boolean" }
+      ]
+    },
+    "expression-or-any": {
+      "oneOf": [
+        { "$ref": "#/$defs/bundled-expression" },
+        { "$ref": "#/$defs/datetime" },
+        { "type": "string" },
+        { "type": "number" },
+        { "type": "boolean" }
+      ]
+    },
     "expression-or-datetime": {
       "oneOf": [
         { "$ref": "#/$defs/bundled-expression" },
diff --git a/schema/plugin/akeneo.json b/schema/plugin/akeneo.json
index 6330490d..85566178 100644
--- a/schema/plugin/akeneo.json
+++ b/schema/plugin/akeneo.json
@@ -121,14 +121,14 @@
               "type": "object",
               "additionalProperties": false,
               "properties": {
-                "map": { "$ref": "fastmap.json#/$defs/fastmap-items" }
+                "map": { "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/plugin/fastmap.json#/$defs/fastmap-items" }
               }
             },
             {
               "type": "object",
               "additionalProperties": false,
               "properties": {
-                "object": { "$ref": "fastmap.json#/$defs/fastmap-items" },
+                "object": { "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/plugin/fastmap.json#/$defs/fastmap-items" },
                 "class": { "type": "string" }
               }
             }
diff --git a/schema/plugin/sql.json b/schema/plugin/sql.json
index 33ca5028..e8d136ea 100644
--- a/schema/plugin/sql.json
+++ b/schema/plugin/sql.json
@@ -3,9 +3,211 @@
   "$id": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/plugin/sql.json",
   "title": "SQL plugin for Middleware Satellite",
   "description": "A Satellite is a micro-service aimed at managing data pipelines and data processing",
-  "type": "object",
-  "additionalProperties": false,
-  "properties": {
-    "expression_language": { "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/definitions.json#/$defs/expression_language" }
-  }
+  "$defs": {
+    "connection": {
+      "type": "object",
+      "properties": {
+        "dsn": { "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/expressions.json#/$defs/expression-or-string" },
+        "username": { "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/expressions.json#/$defs/expression-or-string" },
+        "password": { "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/expressions.json#/$defs/expression-or-string" },
+        "persistent": { "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/expressions.json#/$defs/expression-or-boolean" },
+        "shared": { "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/expressions.json#/$defs/expression-or-boolean" }
+      }
+    },
+    "query-parameters": {
+      "oneOf": [
+        {
+          "type": "object",
+          "patternProperties": {
+            ".*": {
+              "type": "object",
+              "properties": {
+                "oneOf": [
+                  {
+                    "type": "object",
+                    "properties": {
+                      "value": { "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/expressions.json#/$defs/expression-or-any" }
+                    }
+                  },
+                  {
+                    "type": "object",
+                    "properties": {
+                      "from": { "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/expressions.json#/$defs/bundled-expression" }
+                    }
+                  }
+                ]
+              }
+            }
+          }
+        },
+        {
+          "type": "array",
+          "items": {
+            "type": "object",
+            "properties": {
+              "type": "object",
+              "properties": {
+                "value": { "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/expressions.json#/$defs/expression-or-any" }
+              }
+            }
+          }
+        }
+      ]
+    },
+    "query-list": {
+      "type": "array",
+      "items": { "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/expressions.json#/$defs/expression-or-string" }
+    }
+  },
+  "oneOf": [
+    {
+      "type": "object",
+      "additionalProperties": false,
+      "properties": {
+        "expression_language": { "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/definitions.json#/$defs/expression_language" },
+        "connection": { "$ref": "#/$defs/connection"},
+        "before": { "$ref": "#/$defs/query-list"},
+        "after": { "$ref": "#/$defs/query-list"},
+        "extractor": {
+          "oneOf": [
+            {
+              "type": "object",
+              "properties": {
+                "query": { "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/expressions.json#/$defs/expression-or-string" },
+                "parameters": { "$ref": "#/$defs/query-parameters"}
+              }
+            },
+            {
+              "type": "object",
+              "properties": {
+                "conditional": {
+                  "type": "array",
+                  "items": {
+                    "type": "object",
+                    "properties": {
+                      "condition":{ "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/expressions.json#/$defs/bundled-expression" },
+                      "query": { "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/expressions.json#/$defs/expression-or-string" },
+                      "parameters": { "$ref": "#/$defs/query-parameters"}
+                    }
+                  }
+                }
+              }
+            }
+          ]
+        }
+      }
+    },
+    {
+      "type": "object",
+      "additionalProperties": false,
+      "properties": {
+        "expression_language": { "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/definitions.json#/$defs/expression_language" },
+        "connection": { "$ref": "#/$defs/connection"},
+        "before": { "$ref": "#/$defs/query-list"},
+        "after": { "$ref": "#/$defs/query-list"},
+        "lookup": {
+          "oneOf": [
+            {
+              "type": "object",
+              "properties": {
+                "query": { "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/expressions.json#/$defs/expression-or-string" },
+                "parameters": { "$ref": "#/$defs/query-parameters"},
+                "merge": {
+                  "oneOf": [
+                    {
+                      "type": "object",
+                      "additionalProperties": false,
+                      "properties": {
+                        "map": { "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/plugin/fastmap.json#/$defs/fastmap-items" }
+                      }
+                    },
+                    {
+                      "type": "object",
+                      "additionalProperties": false,
+                      "properties": {
+                        "object": { "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/plugin/fastmap.json#/$defs/fastmap-items" },
+                        "class": { "type": "string" }
+                      }
+                    }
+                  ]
+                }
+              }
+            },
+            {
+              "type": "object",
+              "properties": {
+                "conditional": {
+                  "type": "array",
+                  "items": {
+                    "type": "object",
+                    "properties": {
+                      "condition":{ "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/expressions.json#/$defs/bundled-expression" },
+                      "query": { "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/expressions.json#/$defs/expression-or-string" },
+                      "parameters": { "$ref": "#/$defs/query-parameters"},
+                      "merge": {
+                        "oneOf": [
+                          {
+                            "type": "object",
+                            "additionalProperties": false,
+                            "properties": {
+                              "map": { "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/plugin/fastmap.json#/$defs/fastmap-items" }
+                            }
+                          },
+                          {
+                            "type": "object",
+                            "additionalProperties": false,
+                            "properties": {
+                              "object": { "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/plugin/fastmap.json#/$defs/fastmap-items" },
+                              "class": { "type": "string" }
+                            }
+                          }
+                        ]
+                      }
+                    }
+                  }
+                }
+              }
+            }
+          ]
+        }
+      }
+    },
+    {
+      "type": "object",
+      "additionalProperties": false,
+      "properties": {
+        "expression_language": { "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/definitions.json#/$defs/expression_language" },
+        "connection": { "$ref": "#/$defs/connection"},
+        "before": { "$ref": "#/$defs/query-list"},
+        "after": { "$ref": "#/$defs/query-list"},
+        "loader": {
+          "oneOf": [
+            {
+              "type": "object",
+              "properties": {
+                "query": { "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/expressions.json#/$defs/expression-or-string" },
+                "parameters": { "$ref": "#/$defs/query-parameters"}
+              }
+            },
+            {
+              "type": "object",
+              "properties": {
+                "conditional": {
+                  "type": "array",
+                  "items": {
+                    "type": "object",
+                    "properties": {
+                      "condition":{ "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/expressions.json#/$defs/bundled-expression" },
+                      "query": { "$ref": "https://raw.githubusercontent.com/php-etl/satellite/master/schema/expressions.json#/$defs/expression-or-string" },
+                      "parameters": { "$ref": "#/$defs/query-parameters"}
+                    }
+                  }
+                }
+              }
+            }
+          ]
+        }
+      }
+    }
+  ]
 }