diff --git a/docs/UserGuide.md b/docs/UserGuide.md
index f9479c0a0..6f20f308e 100644
--- a/docs/UserGuide.md
+++ b/docs/UserGuide.md
@@ -153,6 +153,8 @@ These sections are combined to form the [complete profile](#Example-Profile).
 * For a larger profile example see [The schema documentation](user/Schema.md)
 * Further examples can be found in [the Examples folder](https://github.com/finos/datahelix/tree/master/examples)
 
+A Beta feature has been developed for generating nested data (as a step towards support for relational data), for further information see [the Relational data documentation](RelationalData.md).
+
 # Fields
 
 Fields are the "slots" of data that can take values. Typical fields might be _email_address_ or _user_id_. By default, any piece of data is valid for a field. This is an example field object for the profile:
diff --git a/profile/src/main/resources/profileschema/datahelix.schema.json b/profile/src/main/resources/profileschema/datahelix.schema.json
index 7bf07b4d8..62e2896a7 100644
--- a/profile/src/main/resources/profileschema/datahelix.schema.json
+++ b/profile/src/main/resources/profileschema/datahelix.schema.json
@@ -30,6 +30,13 @@
       "items": {
         "$ref": "#/definitions/constraint"
       }
+    },
+    "relationships": {
+      "title": "Defines any child objects",
+      "type": "array",
+      "items": {
+        "$ref": "#/definitions/relationship"
+      }
     }
   },
   "definitions": {
@@ -947,7 +954,74 @@
           "type": "string"
         }
       }
+    },
+    "relationship": {
+      "title": "Defines any nested child objects",
+      "type": "object",
+      "additionalProperties": false,
+      "required": [
+        "name"
+      ],
+      "default": {
+        "name": "relationshipName",
+        "type": "string",
+        "formatting": "",
+        "unique": false,
+        "nullable": true
+      },
+      "properties": {
+        "name": {
+          "type": "string"
+        },
+        "description": {
+          "type": "string"
+        },
+        "profileFile": {
+          "type": "string"
+        },
+        "profile": {
+          "type": "object",
+          "additionalProperties": false,
+          "required": [
+            "fields"
+          ],
+          "properties": {
+            "additionalProperties": false,
+            "description": {
+              "title": "A description of what data the sub-profile is modelling",
+              "type": "string"
+            },
+            "fields": {
+              "title": "The fields that data will be produced for. Field names must begin with an alphabetic character.",
+              "type": "array",
+              "minItems": 1,
+              "uniqueItems": true,
+              "additionalItems": false,
+              "items": {
+                "$ref": "#/definitions/field"
+              }
+            },
+            "constraints": {
+              "title": "The constraints on the data to be output",
+              "type": "array",
+              "additionalItems": false,
+              "items": {
+                "$ref": "#/definitions/constraint"
+              }
+            },
+            "relationships": {
+              "title": "Defines any child objects",
+              "type": "array",
+              "items": {
+                "$ref": "#/definitions/relationship"
+              }
+            }        
+          }
+        },
+        "extents": {
+          "type": "array"
+        }
+      }
     }
   }
 }
-