diff --git a/schemas/api-config/collectionNavigation.json b/schemas/api-config/collectionNavigation.json
index a23479b..021a09b 100644
--- a/schemas/api-config/collectionNavigation.json
+++ b/schemas/api-config/collectionNavigation.json
@@ -132,6 +132,10 @@
                                                     "properties": {
                                                         "label": {
                                                             "$ref": "definitions.json#/definitions/i18nString"
+                                                        },
+                                                        "renderValue": {
+                                                            "description": "render value based on entry ($ variable)",
+                                                            "$ref": "definitions.json#/definitions/evalObjectWithRaw"
                                                         }
                                                     }
                                                 }
diff --git a/schemas/api-config/definitions.json b/schemas/api-config/definitions.json
index af03347..b29d13a 100644
--- a/schemas/api-config/definitions.json
+++ b/schemas/api-config/definitions.json
@@ -11,6 +11,20 @@
             }
         },
 
+        "evalObjectWithRaw": {
+            "type": "object",
+            "properties": {
+                "eval": {
+                    "type": "string",
+                    "description": "js code which must return same schema as value if directly defined"
+                },
+                "raw": {
+                    "type": "boolean",
+                    "description": "if true, the result of the eval passed as pure html"
+                }
+            }
+        },
+
         "i18nString": {
             "oneOf": [
                 {
diff --git a/schemas/api-config/fieldMeta.json b/schemas/api-config/fieldMeta.json
index 5185a94..595c455 100644
--- a/schemas/api-config/fieldMeta.json
+++ b/schemas/api-config/fieldMeta.json
@@ -189,6 +189,57 @@
                 }
             ]
         },
+        {
+            "$ref": "#/definitions/minimum",
+            "patternProperties": {
+                "^x-.*|widget|foreign$": { "$comment": "stub for allOf" }
+            },
+            "allOf": [
+                {
+                    "properties": {
+                        "widget": {
+                            "enum": ["foreignKey"]
+                        },
+                        "foreign": {
+                            "additionalProperties": false,
+                            "description": "foreign key configuration",
+                            "type": "object",
+                            "properties": {
+                                "collection": {
+                                    "type": "string",
+                                    "description": "collection name"
+                                },
+                                "id": {
+                                    "type": "string",
+                                    "description": "id field name"
+                                },
+                                "projection": {
+                                    "type": "string",
+                                    "description": "projection name used for fetching initial foreign entries from database"
+                                },
+                                "sort": {
+                                    "type": "string",
+                                    "description": "sort field name (-field for descending)"
+                                },
+                                "subNavigation": {
+                                    "type": "number",
+                                    "description": "sub navigation index in foreign collection"
+                                },
+                                "render": {
+                                    "description": "field name or eval object which returns string",
+                                    "oneOf": [
+                                        { "type": "string" },
+                                        {
+                                            "$ref": "definitions.json#/definitions/evalObjectWithRaw"
+                                        }
+                                    ]
+                                }
+                            }
+                        }
+                    }
+                }
+            ]
+        },
         {
             "$ref": "#/definitions/minimum",
             "patternProperties": {
@@ -291,10 +342,103 @@
                     "$ref": "definitions.json#/definitions/i18nString",
                     "description": "label for field"
                 },
+                "addElementLabel": {
+                    "$ref": "definitions.json#/definitions/i18nString",
+                    "description": "label for adding element to list"
+                },
                 "helperText": {
                     "$ref": "definitions.json#/definitions/i18nString",
                     "description": "helper text for field"
                 },
+                "filter": {
+                    "type": "object",
+                    "description": "filter configuration for list view of this field",
+                    "additionalProperties": false,
+                    "properties": {
+                        "type": {
+                            "type": "string",
+                            "description": "filter type",
+                            "enum": [
+                                "default",
+                                "select",
+                                "bool",
+                                "boolean",
+                                "input",
+                                "number",
+                                "foreignKey"
+                            ]
+                        }
+                    }
+                },
+                "folding": {
+                    "type": "object",
+                    "description": "folding configuration for array fields",
+                    "additionalProperties": false,
+                    "properties": {
+                        "previewUnfolded": {
+                            "description": "preview for unfolded array element",
+                            "oneOf": [
+                                { "type": "string" },
+                                {
+                                    "$ref": "definitions.json#/definitions/evalObjectWithRaw"
+                                }
+                            ]
+                        },
+                        "previewFolded": {
+                            "description": "preview for folded array element",
+                            "oneOf": [
+                                { "type": "string" },
+                                {
+                                    "$ref": "definitions.json#/definitions/evalObjectWithRaw"
+                                }
+                            ]
+                        }
+                    }
+                },
+                "css": {
+                    "description": "css styles for field widgets",
+                    "type": "object",
+                    "properties": {
+                        "input": {
+                            "type": "object",
+                            "description": "css styles for input widget",
+                            "additionalProperties": false,
+                            "properties": {
+                                "wrapper": {
+                                    "description": "css styles for input widget wrapper",
+                                    "$ref": "#/definitions/css"
+                                },
+                                "element": {
+                                    "description": "css styles for input widget sub elements",
+                                    "$ref": "#/definitions/css"
+                                },
+                                "foreignEntry": {
+                                    "description": "css styles for input widget linked foreign entries",
+                                    "$ref": "#/definitions/css"
+                                }
+                            }
+                        },
+                        "view": {
+                            "type": "object",
+                            "description": "css styles for input widget",
+                            "additionalProperties": false,
+                            "properties": {
+                                "wrapper": {
+                                    "description": "css styles for view widget wrapper",
+                                    "$ref": "#/definitions/css"
+                                },
+                                "element": {
+                                    "description": "css styles for view widget sub elements",
+                                    "$ref": "#/definitions/css"
+                                },
+                                "foreignEntry": {
+                                    "description": "css styles for input widget linked foreign entries",
+                                    "$ref": "#/definitions/css"
+                                }
+                            }
+                        }
+                    }
+                },
                 "dependsOn": {
                     "description": "depends on rule",
                     "oneOf": [
@@ -378,6 +522,23 @@
                     "$ref": "definitions.json#/definitions/evalObject"
                 }
             ]
+        },
+        "css": {
+            "anyOf": [
+                { "type": "string" },
+                {
+                    "$ref": "https://raw.githubusercontent.com/rcorp/css-schema/master/schema.json"
+                },
+                {
+                    "type": "object",
+                    "properties": {
+                        "eval": {
+                            "type": "string",
+                            "description": "javascript code evaled to string or css object"
+                        }
+                    }
+                }
+            ]
         }
     }
 }