diff --git a/schemas/data/bitrate-average-bucket.schema.json b/schemas/data/bitrate-average-bucket.schema.json
new file mode 100644
index 0000000000..017a6b73df
--- /dev/null
+++ b/schemas/data/bitrate-average-bucket.schema.json
@@ -0,0 +1,56 @@
+{
+  "meta:license": [
+    "Copyright 2018 Adobe Systems Incorporated. All rights reserved.",
+    "This work is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license",
+    "you may not use this file except in compliance with the License. You may obtain a copy",
+    "of the License at https://creativecommons.org/licenses/by/4.0/"
+  ],
+  "$id": "https://ns.adobe.com/xdm/data/bitrate-average-bucket",
+  "$schema": "http://json-schema.org/draft-06/schema#",
+  "title": "Bitrate Average Bucket",
+  "type": "object",
+  "meta:extensible": true,
+  "meta:extends": [
+    "https://ns.adobe.com/xdm/data/metricdefinition"
+  ],
+  "description": "The average bitrate classified into predefined buckets of 100kbps intervals.",
+  "definitions": {
+    "metricdefinition": {
+      "properties": {
+        "@id": {
+          "type": "string",
+          "const": "xdm:bitrateAverageBucket",
+          "description": "The unique identifier of this metric."
+        },
+        "schema:name": {
+          "type": "string",
+          "const": "metric: bitrateAverageBucket",
+          "description": "The average bitrate classified into predefined buckets of 100kbps intervals."
+        },
+        "xdm:measurement": {
+          "type": "string",
+          "description": "How to take measures of this metric.",
+          "const": "enum"
+        },
+        "xdm:unit": {
+          "const": null
+        }
+      }
+    }
+  },
+  "allOf": [
+    {
+      "$ref": "#/definitions/metricdefinition"
+    },
+    {
+      "$ref": "https://ns.adobe.com/xdm/data/metricdefinition"
+    }
+  ],
+  "required": [
+    "@id",
+    "schema:name",
+    "xdm:measurement",
+    "xdm:unit"
+  ],
+  "meta:status": "stabilizing"
+}
diff --git a/schemas/data/bitrate-average.schema.json b/schemas/data/bitrate-average.schema.json
new file mode 100644
index 0000000000..a431a0f4c3
--- /dev/null
+++ b/schemas/data/bitrate-average.schema.json
@@ -0,0 +1,56 @@
+{
+  "meta:license": [
+    "Copyright 2018 Adobe Systems Incorporated. All rights reserved.",
+    "This work is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license",
+    "you may not use this file except in compliance with the License. You may obtain a copy",
+    "of the License at https://creativecommons.org/licenses/by/4.0/"
+  ],
+  "$id": "https://ns.adobe.com/xdm/data/bitrate-average",
+  "$schema": "http://json-schema.org/draft-06/schema#",
+  "title": "Bitrate Average",
+  "type": "object",
+  "meta:extensible": true,
+  "meta:extends": [
+    "https://ns.adobe.com/xdm/data/metricdefinition"
+  ],
+  "description": "A weighted average of all bitrate values related to the play duration that occurred during a playback session.",
+  "definitions": {
+    "metricdefinition": {
+      "properties": {
+        "@id": {
+          "type": "string",
+          "const": "xdm:bitrateAverage",
+          "description": "The unique identifier of this metric."
+        },
+        "schema:name": {
+          "type": "string",
+          "const": "metric: bitrateAverage",
+          "description": "A weighted average of all bitrate values related to the play duration that occurred during a playback session."
+        },
+        "xdm:measurement": {
+          "type": "string",
+          "description": "How to take measures of this metric.",
+          "const": "average"
+        },
+        "xdm:unit": {
+          "const": "kbps"
+        }
+      }
+    }
+  },
+  "allOf": [
+    {
+      "$ref": "#/definitions/metricdefinition"
+    },
+    {
+      "$ref": "https://ns.adobe.com/xdm/data/metricdefinition"
+    }
+  ],
+  "required": [
+    "@id",
+    "schema:name",
+    "xdm:measurement",
+    "xdm:unit"
+  ],
+  "meta:status": "stabilizing"
+}
diff --git a/schemas/data/bitrate-changes.schema.json b/schemas/data/bitrate-changes.schema.json
new file mode 100644
index 0000000000..56e3496171
--- /dev/null
+++ b/schemas/data/bitrate-changes.schema.json
@@ -0,0 +1,56 @@
+{
+  "meta:license": [
+    "Copyright 2018 Adobe Systems Incorporated. All rights reserved.",
+    "This work is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license",
+    "you may not use this file except in compliance with the License. You may obtain a copy",
+    "of the License at https://creativecommons.org/licenses/by/4.0/"
+  ],
+  "$id": "https://ns.adobe.com/xdm/data/bitrate-changes",
+  "$schema": "http://json-schema.org/draft-06/schema#",
+  "title": "Bitrate Changes",
+  "type": "object",
+  "meta:extensible": true,
+  "meta:extends": [
+    "https://ns.adobe.com/xdm/data/metricdefinition"
+  ],
+  "description": "The number of bitrate change events that occurred during a playback session.",
+  "definitions": {
+    "metricdefinition": {
+      "properties": {
+        "@id": {
+          "type": "string",
+          "const": "xdm:bitrateChanges",
+          "description": "The unique identifier of this metric."
+        },
+        "schema:name": {
+          "type": "string",
+          "const": "metric: bitrateChanges",
+          "description": "The number of bitrate change events that occurred during a playback session."
+        },
+        "xdm:measurement": {
+          "type": "string",
+          "description": "How to take measures of this metric.",
+          "const": "count"
+        },
+        "xdm:unit": {
+          "const": null
+        }
+      }
+    }
+  },
+  "allOf": [
+    {
+      "$ref": "#/definitions/metricdefinition"
+    },
+    {
+      "$ref": "https://ns.adobe.com/xdm/data/metricdefinition"
+    }
+  ],
+  "required": [
+    "@id",
+    "schema:name",
+    "xdm:measurement",
+    "xdm:unit"
+  ],
+  "meta:status": "stabilizing"
+}
diff --git a/schemas/data/buffer-time.schema.json b/schemas/data/buffer-time.schema.json
new file mode 100644
index 0000000000..d644cc55eb
--- /dev/null
+++ b/schemas/data/buffer-time.schema.json
@@ -0,0 +1,56 @@
+{
+  "meta:license": [
+    "Copyright 2018 Adobe Systems Incorporated. All rights reserved.",
+    "This work is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license",
+    "you may not use this file except in compliance with the License. You may obtain a copy",
+    "of the License at https://creativecommons.org/licenses/by/4.0/"
+  ],
+  "$id": "https://ns.adobe.com/xdm/data/buffer-time",
+  "$schema": "http://json-schema.org/draft-06/schema#",
+  "title": "Buffer Time",
+  "type": "object",
+  "meta:extensible": true,
+  "meta:extends": [
+    "https://ns.adobe.com/xdm/data/metricdefinition"
+  ],
+  "description": "Describes the total amount of time spent buffering.",
+  "definitions": {
+    "metricdefinition": {
+      "properties": {
+        "@id": {
+          "type": "string",
+          "const": "xdm:bufferTime",
+          "description": "The unique identifier of this metric."
+        },
+        "schema:name": {
+          "type": "string",
+          "const": "metric: bufferTime",
+          "description": "Describes the total amount of time spent buffering."
+        },
+        "xdm:measurement": {
+          "type": "string",
+          "description": "How to take measures of this metric.",
+          "const": "time"
+        },
+        "xdm:unit": {
+          "const": "second"
+        }
+      }
+    }
+  },
+  "allOf": [
+    {
+      "$ref": "#/definitions/metricdefinition"
+    },
+    {
+      "$ref": "https://ns.adobe.com/xdm/data/metricdefinition"
+    }
+  ],
+  "required": [
+    "@id",
+    "schema:name",
+    "xdm:measurement",
+    "xdm:unit"
+  ],
+  "meta:status": "stabilizing"
+}
diff --git a/schemas/data/buffers.schema.json b/schemas/data/buffers.schema.json
new file mode 100644
index 0000000000..e471ed3f4b
--- /dev/null
+++ b/schemas/data/buffers.schema.json
@@ -0,0 +1,56 @@
+{
+  "meta:license": [
+    "Copyright 2018 Adobe Systems Incorporated. All rights reserved.",
+    "This work is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license",
+    "you may not use this file except in compliance with the License. You may obtain a copy",
+    "of the License at https://creativecommons.org/licenses/by/4.0/"
+  ],
+  "$id": "https://ns.adobe.com/xdm/data/buffers",
+  "$schema": "http://json-schema.org/draft-06/schema#",
+  "title": "Buffers",
+  "type": "object",
+  "meta:extensible": true,
+  "meta:extends": [
+    "https://ns.adobe.com/xdm/data/metricdefinition"
+  ],
+  "description": "The number of the different buffer states that occurred during a playback session.",
+  "definitions": {
+    "metricdefinition": {
+      "properties": {
+        "@id": {
+          "type": "string",
+          "const": "xdm:buffers",
+          "description": "The unique identifier of this metric."
+        },
+        "schema:name": {
+          "type": "string",
+          "const": "metric: buffers",
+          "description": "The number of the different buffer states that occurred during a playback session."
+        },
+        "xdm:measurement": {
+          "type": "string",
+          "description": "How to take measures of this metric.",
+          "const": "count"
+        },
+        "xdm:unit": {
+          "const": null
+        }
+      }
+    }
+  },
+  "allOf": [
+    {
+      "$ref": "#/definitions/metricdefinition"
+    },
+    {
+      "$ref": "https://ns.adobe.com/xdm/data/metricdefinition"
+    }
+  ],
+  "required": [
+    "@id",
+    "schema:name",
+    "xdm:measurement",
+    "xdm:unit"
+  ],
+  "meta:status": "stabilizing"
+}
diff --git a/schemas/data/completes.schema.json b/schemas/data/completes.schema.json
index 832c44a5b5..5ebde76988 100644
--- a/schemas/data/completes.schema.json
+++ b/schemas/data/completes.schema.json
@@ -11,7 +11,7 @@
   "type": "object",
   "meta:extensible": true,
   "meta:extends": ["https://ns.adobe.com/xdm/data/metricdefinition"],
-  "description": "The metric completes describes digital video assets which played through its entire duration.",
+  "description": "Indicates if a timed media asset was watched to completion - this does not necessarily mean the viewer watched the whole video; viewer could have skipped ahead.",
   "definitions": {
     "metricdefinition": {
       "properties": {
@@ -24,7 +24,7 @@
           "type": "string",
           "const": "metric: completes",
           "description":
-          "The human-readable name of the metric. The name can be used in user interfaces and does not have to be unique."
+          "Indicates if a timed media asset was watched to completion - this does not necessarily mean the viewer watched the whole video; viewer could have skipped ahead."
         },
         "xdm:measurement": {
           "type": "string",
diff --git a/schemas/data/drop-before-start.schema.json b/schemas/data/drop-before-start.schema.json
new file mode 100644
index 0000000000..bf3ae8337a
--- /dev/null
+++ b/schemas/data/drop-before-start.schema.json
@@ -0,0 +1,56 @@
+{
+  "meta:license": [
+    "Copyright 2018 Adobe Systems Incorporated. All rights reserved.",
+    "This work is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license",
+    "you may not use this file except in compliance with the License. You may obtain a copy",
+    "of the License at https://creativecommons.org/licenses/by/4.0/"
+  ],
+  "$id": "https://ns.adobe.com/xdm/data/drop-before-start",
+  "$schema": "http://json-schema.org/draft-06/schema#",
+  "title": "Drop before Start",
+  "type": "object",
+  "meta:extensible": true,
+  "meta:extends": [
+    "https://ns.adobe.com/xdm/data/metricdefinition"
+  ],
+  "description": "Indicates the user abandoned the media stream before the first frame (e.g. during the pre-roll ad break, due to an error while loading the content from the CDN).",
+  "definitions": {
+    "metricdefinition": {
+      "properties": {
+        "@id": {
+          "type": "string",
+          "const": "xdm:dropBeforeStart",
+          "description": "The unique identifier of this metric."
+        },
+        "schema:name": {
+          "type": "string",
+          "const": "metric: dropBeforeStart",
+          "description": "Indicates the user abandoned the media stream before the first frame (e.g. during the pre-roll ad break, due to an error while loading the content from the CDN)."
+        },
+        "xdm:measurement": {
+          "type": "string",
+          "description": "How to take measures of this metric.",
+          "const": "count"
+        },
+        "xdm:unit": {
+          "const": null
+        }
+      }
+    }
+  },
+  "allOf": [
+    {
+      "$ref": "#/definitions/metricdefinition"
+    },
+    {
+      "$ref": "https://ns.adobe.com/xdm/data/metricdefinition"
+    }
+  ],
+  "required": [
+    "@id",
+    "schema:name",
+    "xdm:measurement",
+    "xdm:unit"
+  ],
+  "meta:status": "stabilizing"
+}
diff --git a/schemas/data/dropped-frames.schema.json b/schemas/data/dropped-frames.schema.json
new file mode 100644
index 0000000000..02275e3cf6
--- /dev/null
+++ b/schemas/data/dropped-frames.schema.json
@@ -0,0 +1,56 @@
+{
+  "meta:license": [
+    "Copyright 2018 Adobe Systems Incorporated. All rights reserved.",
+    "This work is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license",
+    "you may not use this file except in compliance with the License. You may obtain a copy",
+    "of the License at https://creativecommons.org/licenses/by/4.0/"
+  ],
+  "$id": "https://ns.adobe.com/xdm/data/dropped-frames",
+  "$schema": "http://json-schema.org/draft-06/schema#",
+  "title": "Dropped Frames",
+  "type": "object",
+  "meta:extensible": true,
+  "meta:extends": [
+    "https://ns.adobe.com/xdm/data/metricdefinition"
+  ],
+  "description": "The number of frames dropped during a playback session.",
+  "definitions": {
+    "metricdefinition": {
+      "properties": {
+        "@id": {
+          "type": "string",
+          "const": "xdm:droppedFrames",
+          "description": "The unique identifier of this metric."
+        },
+        "schema:name": {
+          "type": "string",
+          "const": "metric: droppedFrames",
+          "description": "The number of frames dropped during a playback session."
+        },
+        "xdm:measurement": {
+          "type": "string",
+          "description": "How to take measures of this metric.",
+          "const": "count"
+        },
+        "xdm:unit": {
+          "const": null
+        }
+      }
+    }
+  },
+  "allOf": [
+    {
+      "$ref": "#/definitions/metricdefinition"
+    },
+    {
+      "$ref": "https://ns.adobe.com/xdm/data/metricdefinition"
+    }
+  ],
+  "required": [
+    "@id",
+    "schema:name",
+    "xdm:measurement",
+    "xdm:unit"
+  ],
+  "meta:status": "stabilizing"
+}
diff --git a/schemas/data/errors.schema.json b/schemas/data/errors.schema.json
new file mode 100644
index 0000000000..ceb0918a1d
--- /dev/null
+++ b/schemas/data/errors.schema.json
@@ -0,0 +1,56 @@
+{
+  "meta:license": [
+    "Copyright 2018 Adobe Systems Incorporated. All rights reserved.",
+    "This work is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license",
+    "you may not use this file except in compliance with the License. You may obtain a copy",
+    "of the License at https://creativecommons.org/licenses/by/4.0/"
+  ],
+  "$id": "https://ns.adobe.com/xdm/data/errors",
+  "$schema": "http://json-schema.org/draft-06/schema#",
+  "title": "Errors",
+  "type": "object",
+  "meta:extensible": true,
+  "meta:extends": [
+    "https://ns.adobe.com/xdm/data/metricdefinition"
+  ],
+  "description": "The number of errors that were encountered during playback.",
+  "definitions": {
+    "metricdefinition": {
+      "properties": {
+        "@id": {
+          "type": "string",
+          "const": "xdm:errors",
+          "description": "The unique identifier of this metric."
+        },
+        "schema:name": {
+          "type": "string",
+          "const": "metric: errors",
+          "description": "The number of errors that were encountered during playback."
+        },
+        "xdm:measurement": {
+          "type": "string",
+          "description": "How to take measures of this metric.",
+          "const": "count"
+        },
+        "xdm:unit": {
+          "const": null
+        }
+      }
+    }
+  },
+  "allOf": [
+    {
+      "$ref": "#/definitions/metricdefinition"
+    },
+    {
+      "$ref": "https://ns.adobe.com/xdm/data/metricdefinition"
+    }
+  ],
+  "required": [
+    "@id",
+    "schema:name",
+    "xdm:measurement",
+    "xdm:unit"
+  ],
+  "meta:status": "stabilizing"
+}
diff --git a/schemas/data/federated.schema.json b/schemas/data/federated.schema.json
new file mode 100644
index 0000000000..e529bd2cec
--- /dev/null
+++ b/schemas/data/federated.schema.json
@@ -0,0 +1,56 @@
+{
+  "meta:license": [
+    "Copyright 2018 Adobe Systems Incorporated. All rights reserved.",
+    "This work is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license",
+    "you may not use this file except in compliance with the License. You may obtain a copy",
+    "of the License at https://creativecommons.org/licenses/by/4.0/"
+  ],
+  "$id": "https://ns.adobe.com/xdm/data/federated",
+  "$schema": "http://json-schema.org/draft-06/schema#",
+  "title": "Federated",
+  "type": "object",
+  "meta:extensible": true,
+  "meta:extends": [
+    "https://ns.adobe.com/xdm/data/metricdefinition"
+  ],
+  "description": "Indicates if the experience event was created through federation.",
+  "definitions": {
+    "metricdefinition": {
+      "properties": {
+        "@id": {
+          "type": "string",
+          "const": "xdm:federated",
+          "description": "The unique identifier of this metric."
+        },
+        "schema:name": {
+          "type": "string",
+          "const": "metric: federated",
+          "description": "Indicates if the experience event was created through federation."
+        },
+        "xdm:measurement": {
+          "type": "string",
+          "description": "How to take measures of this metric.",
+          "const": "count"
+        },
+        "xdm:unit": {
+          "const": null
+        }
+      }
+    }
+  },
+  "allOf": [
+    {
+      "$ref": "#/definitions/metricdefinition"
+    },
+    {
+      "$ref": "https://ns.adobe.com/xdm/data/metricdefinition"
+    }
+  ],
+  "required": [
+    "@id",
+    "schema:name",
+    "xdm:measurement",
+    "xdm:unit"
+  ],
+  "meta:status": "stabilizing"
+}
diff --git a/schemas/data/loads.schema.json b/schemas/data/loads.schema.json
new file mode 100644
index 0000000000..f272f38ac3
--- /dev/null
+++ b/schemas/data/loads.schema.json
@@ -0,0 +1,56 @@
+{
+  "meta:license": [
+    "Copyright 2018 Adobe Systems Incorporated. All rights reserved.",
+    "This work is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license",
+    "you may not use this file except in compliance with the License. You may obtain a copy",
+    "of the License at https://creativecommons.org/licenses/by/4.0/"
+  ],
+  "$id": "https://ns.adobe.com/xdm/data/loads",
+  "$schema": "http://json-schema.org/draft-06/schema#",
+  "title": "Loads",
+  "type": "object",
+  "meta:extensible": true,
+  "meta:extends": [
+    "https://ns.adobe.com/xdm/data/metricdefinition"
+  ],
+  "description": "Describes the intention to play a timed media asset. It does not measure success, as the user might abandon the content before the first frame is viewed.",
+  "definitions": {
+    "metricdefinition": {
+      "properties": {
+        "@id": {
+          "type": "string",
+          "const": "xdm:loads",
+          "description": "The unique identifier of this metric."
+        },
+        "schema:name": {
+          "type": "string",
+          "const": "metric: starts",
+          "description": "Describes the intention to play a timed media asset. It does not measure success, as the user might abandon the content before the first frame is viewed."
+        },
+        "xdm:measurement": {
+          "type": "string",
+          "description": "How to take measures of this metric.",
+          "const": "count"
+        },
+        "xdm:unit": {
+          "const": null
+        }
+      }
+    }
+  },
+  "allOf": [
+    {
+      "$ref": "#/definitions/metricdefinition"
+    },
+    {
+      "$ref": "https://ns.adobe.com/xdm/data/metricdefinition"
+    }
+  ],
+  "required": [
+    "@id",
+    "schema:name",
+    "xdm:measurement",
+    "xdm:unit"
+  ],
+  "meta:status": "stabilizing"
+}
diff --git a/schemas/data/media-segment-view.schema.json b/schemas/data/media-segment-view.schema.json
new file mode 100644
index 0000000000..a0a2f8e949
--- /dev/null
+++ b/schemas/data/media-segment-view.schema.json
@@ -0,0 +1,56 @@
+{
+  "meta:license": [
+    "Copyright 2018 Adobe Systems Incorporated. All rights reserved.",
+    "This work is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license",
+    "you may not use this file except in compliance with the License. You may obtain a copy",
+    "of the License at https://creativecommons.org/licenses/by/4.0/"
+  ],
+  "$id": "https://ns.adobe.com/xdm/data/media-segment-vie",
+  "$schema": "http://json-schema.org/draft-06/schema#",
+  "title": "Media Segment View",
+  "type": "object",
+  "meta:extensible": true,
+  "meta:extends": [
+    "https://ns.adobe.com/xdm/data/metricdefinition"
+  ],
+  "description": "Indicates whether at least one frame (not necessarily the first) was viewed.",
+  "definitions": {
+    "metricdefinition": {
+      "properties": {
+        "@id": {
+          "type": "string",
+          "const": "xdm:mediaSegmentView",
+          "description": "The unique identifier of this metric."
+        },
+        "schema:name": {
+          "type": "string",
+          "const": "metric: mediaSegmentView",
+          "description": "Indicates whether at least one frame (not necessarily the first) was viewed."
+        },
+        "xdm:measurement": {
+          "type": "string",
+          "description": "How to take measures of this metric.",
+          "const": "count"
+        },
+        "xdm:unit": {
+          "const": null
+        }
+      }
+    }
+  },
+  "allOf": [
+    {
+      "$ref": "#/definitions/metricdefinition"
+    },
+    {
+      "$ref": "https://ns.adobe.com/xdm/data/metricdefinition"
+    }
+  ],
+  "required": [
+    "@id",
+    "schema:name",
+    "xdm:measurement",
+    "xdm:unit"
+  ],
+  "meta:status": "stabilizing"
+}
diff --git a/schemas/data/media-segment.schema.json b/schemas/data/media-segment.schema.json
new file mode 100644
index 0000000000..379d041e4d
--- /dev/null
+++ b/schemas/data/media-segment.schema.json
@@ -0,0 +1,56 @@
+{
+  "meta:license": [
+    "Copyright 2018 Adobe Systems Incorporated. All rights reserved.",
+    "This work is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license",
+    "you may not use this file except in compliance with the License. You may obtain a copy",
+    "of the License at https://creativecommons.org/licenses/by/4.0/"
+  ],
+  "$id": "https://ns.adobe.com/xdm/data/media-segment",
+  "$schema": "http://json-schema.org/draft-06/schema#",
+  "title": "Media Segment",
+  "type": "object",
+  "meta:extensible": true,
+  "meta:extends": [
+    "https://ns.adobe.com/xdm/data/metricdefinition"
+  ],
+  "description": "The interval that describes the part of the content that has been viewed (in minutes). The segment is computed as min and max of the playhead values during a playback session.",
+  "definitions": {
+    "metricdefinition": {
+      "properties": {
+        "@id": {
+          "type": "string",
+          "const": "xdm:mediaSegment",
+          "description": "The unique identifier of this metric."
+        },
+        "schema:name": {
+          "type": "string",
+          "const": "metric: mediaSegment",
+          "description": "The interval that describes the part of the content that has been viewed (in minutes). The segment is computed as min and max of the playhead values during a playback session."
+        },
+        "xdm:measurement": {
+          "type": "string",
+          "description": "How to take measures of this metric.",
+          "const": "interval"
+        },
+        "xdm:unit": {
+          "const": null
+        }
+      }
+    }
+  },
+  "allOf": [
+    {
+      "$ref": "#/definitions/metricdefinition"
+    },
+    {
+      "$ref": "https://ns.adobe.com/xdm/data/metricdefinition"
+    }
+  ],
+  "required": [
+    "@id",
+    "schema:name",
+    "xdm:measurement",
+    "xdm:unit"
+  ],
+  "meta:status": "stabilizing"
+}
diff --git a/schemas/data/pause-time.schema.json b/schemas/data/pause-time.schema.json
new file mode 100644
index 0000000000..5e500bc90c
--- /dev/null
+++ b/schemas/data/pause-time.schema.json
@@ -0,0 +1,56 @@
+{
+  "meta:license": [
+    "Copyright 2018 Adobe Systems Incorporated. All rights reserved.",
+    "This work is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license",
+    "you may not use this file except in compliance with the License. You may obtain a copy",
+    "of the License at https://creativecommons.org/licenses/by/4.0/"
+  ],
+  "$id": "https://ns.adobe.com/xdm/data/pause-time",
+  "$schema": "http://json-schema.org/draft-06/schema#",
+  "title": "Pause Time",
+  "type": "object",
+  "meta:extensible": true,
+  "meta:extends": [
+    "https://ns.adobe.com/xdm/data/metricdefinition"
+  ],
+  "description": "Describes the duration in which playback was paused by the user.",
+  "definitions": {
+    "metricdefinition": {
+      "properties": {
+        "@id": {
+          "type": "string",
+          "const": "xdm:pauseTime",
+          "description": "The unique identifier of this metric."
+        },
+        "schema:name": {
+          "type": "string",
+          "const": "metric: pauseTime",
+          "description": "Describes the duration in which playback was paused by the user."
+        },
+        "xdm:measurement": {
+          "type": "string",
+          "description": "How to take measures of this metric.",
+          "const": "time"
+        },
+        "xdm:unit": {
+          "const": "second"
+        }
+      }
+    }
+  },
+  "allOf": [
+    {
+      "$ref": "#/definitions/metricdefinition"
+    },
+    {
+      "$ref": "https://ns.adobe.com/xdm/data/metricdefinition"
+    }
+  ],
+  "required": [
+    "@id",
+    "schema:name",
+    "xdm:measurement",
+    "xdm:unit"
+  ],
+  "meta:status": "stabilizing"
+}
diff --git a/schemas/data/pauses.schema.json b/schemas/data/pauses.schema.json
new file mode 100644
index 0000000000..d0157249dd
--- /dev/null
+++ b/schemas/data/pauses.schema.json
@@ -0,0 +1,56 @@
+{
+  "meta:license": [
+    "Copyright 2018 Adobe Systems Incorporated. All rights reserved.",
+    "This work is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license",
+    "you may not use this file except in compliance with the License. You may obtain a copy",
+    "of the License at https://creativecommons.org/licenses/by/4.0/"
+  ],
+  "$id": "https://ns.adobe.com/xdm/data/pauses",
+  "$schema": "http://json-schema.org/draft-06/schema#",
+  "title": "Pauses",
+  "type": "object",
+  "meta:extensible": true,
+  "meta:extends": [
+    "https://ns.adobe.com/xdm/data/metricdefinition"
+  ],
+  "description": "The number of pause periods that occurred during playback.",
+  "definitions": {
+    "metricdefinition": {
+      "properties": {
+        "@id": {
+          "type": "string",
+          "const": "xdm:pauses",
+          "description": "The unique identifier of this metric."
+        },
+        "schema:name": {
+          "type": "string",
+          "const": "metric: pauses",
+          "description": "The number of pause periods that occurred during playback."
+        },
+        "xdm:measurement": {
+          "type": "string",
+          "description": "How to take measures of this metric.",
+          "const": "count"
+        },
+        "xdm:unit": {
+          "const": null
+        }
+      }
+    }
+  },
+  "allOf": [
+    {
+      "$ref": "#/definitions/metricdefinition"
+    },
+    {
+      "$ref": "https://ns.adobe.com/xdm/data/metricdefinition"
+    }
+  ],
+  "required": [
+    "@id",
+    "schema:name",
+    "xdm:measurement",
+    "xdm:unit"
+  ],
+  "meta:status": "stabilizing"
+}
diff --git a/schemas/data/progress10.schema.json b/schemas/data/progress10.schema.json
new file mode 100644
index 0000000000..412bdf32ed
--- /dev/null
+++ b/schemas/data/progress10.schema.json
@@ -0,0 +1,56 @@
+{
+  "meta:license": [
+    "Copyright 2018 Adobe Systems Incorporated. All rights reserved.",
+    "This work is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license",
+    "you may not use this file except in compliance with the License. You may obtain a copy",
+    "of the License at https://creativecommons.org/licenses/by/4.0/"
+  ],
+  "$id": "https://ns.adobe.com/xdm/data/progress10",
+  "$schema": "http://json-schema.org/draft-06/schema#",
+  "title": "10% Progress Marker",
+  "type": "object",
+  "meta:extensible": true,
+  "meta:extends": [
+    "https://ns.adobe.com/xdm/data/metricdefinition"
+  ],
+  "description": "Indicates that the playhead passed the 10% marker of media based on stream length. The marker is only counted once, even if seeking backwards. If seeking forward, markers that are skipped are not counted.",
+  "definitions": {
+    "metricdefinition": {
+      "properties": {
+        "@id": {
+          "type": "string",
+          "const": "xdm:progress10",
+          "description": "The unique identifier of this metric."
+        },
+        "schema:name": {
+          "type": "string",
+          "const": "metric: progress10",
+          "description": "Indicates that the playhead passed the 10% marker of media based on stream length. The marker is only counted once, even if seeking backwards. If seeking forward, markers that are skipped are not counted."
+        },
+        "xdm:measurement": {
+          "type": "string",
+          "description": "How to take measures of this metric.",
+          "const": "count"
+        },
+        "xdm:unit": {
+          "const": null
+        }
+      }
+    }
+  },
+  "allOf": [
+    {
+      "$ref": "#/definitions/metricdefinition"
+    },
+    {
+      "$ref": "https://ns.adobe.com/xdm/data/metricdefinition"
+    }
+  ],
+  "required": [
+    "@id",
+    "schema:name",
+    "xdm:measurement",
+    "xdm:unit"
+  ],
+  "meta:status": "stabilizing"
+}
diff --git a/schemas/data/progress95.schema.json b/schemas/data/progress95.schema.json
new file mode 100644
index 0000000000..96fd41f7f2
--- /dev/null
+++ b/schemas/data/progress95.schema.json
@@ -0,0 +1,56 @@
+{
+  "meta:license": [
+    "Copyright 2018 Adobe Systems Incorporated. All rights reserved.",
+    "This work is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license",
+    "you may not use this file except in compliance with the License. You may obtain a copy",
+    "of the License at https://creativecommons.org/licenses/by/4.0/"
+  ],
+  "$id": "https://ns.adobe.com/xdm/data/progress95",
+  "$schema": "http://json-schema.org/draft-06/schema#",
+  "title": "95% Progress Marker",
+  "type": "object",
+  "meta:extensible": true,
+  "meta:extends": [
+    "https://ns.adobe.com/xdm/data/metricdefinition"
+  ],
+  "description": "Indicates that the playhead passed the 95% marker of media based on stream length. The marker is only counted once, even if seeking backwards. If seeking forward, markers that are skipped are not counted.",
+  "definitions": {
+    "metricdefinition": {
+      "properties": {
+        "@id": {
+          "type": "string",
+          "const": "xdm:progress95",
+          "description": "The unique identifier of this metric."
+        },
+        "schema:name": {
+          "type": "string",
+          "const": "metric: progress95",
+          "description": "Indicates that the playhead passed the 95% marker of media based on stream length. The marker is only counted once, even if seeking backwards. If seeking forward, markers that are skipped are not counted."
+        },
+        "xdm:measurement": {
+          "type": "string",
+          "description": "How to take measures of this metric.",
+          "const": "count"
+        },
+        "xdm:unit": {
+          "const": null
+        }
+      }
+    }
+  },
+  "allOf": [
+    {
+      "$ref": "#/definitions/metricdefinition"
+    },
+    {
+      "$ref": "https://ns.adobe.com/xdm/data/metricdefinition"
+    }
+  ],
+  "required": [
+    "@id",
+    "schema:name",
+    "xdm:measurement",
+    "xdm:unit"
+  ],
+  "meta:status": "stabilizing"
+}
diff --git a/schemas/data/resumes.schema.json b/schemas/data/resumes.schema.json
new file mode 100644
index 0000000000..fb7cfdd929
--- /dev/null
+++ b/schemas/data/resumes.schema.json
@@ -0,0 +1,56 @@
+{
+  "meta:license": [
+    "Copyright 2018 Adobe Systems Incorporated. All rights reserved.",
+    "This work is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license",
+    "you may not use this file except in compliance with the License. You may obtain a copy",
+    "of the License at https://creativecommons.org/licenses/by/4.0/"
+  ],
+  "$id": "https://ns.adobe.com/xdm/data/resumes",
+  "$schema": "http://json-schema.org/draft-06/schema#",
+  "title": "Resumes",
+  "type": "object",
+  "meta:extensible": true,
+  "meta:extends": [
+    "https://ns.adobe.com/xdm/data/metricdefinition"
+  ],
+  "description": "Marks each playback that was resumed after more than 30 minutes of buffer, pause, or stall period.",
+  "definitions": {
+    "metricdefinition": {
+      "properties": {
+        "@id": {
+          "type": "string",
+          "const": "xdm:resumes",
+          "description": "The unique identifier of this metric."
+        },
+        "schema:name": {
+          "type": "string",
+          "const": "metric: resumes",
+          "description": "Marks each playback that was resumed after more than 30 minutes of buffer, pause, or stall period."
+        },
+        "xdm:measurement": {
+          "type": "string",
+          "description": "How to take measures of this metric.",
+          "const": "count"
+        },
+        "xdm:unit": {
+          "const": null
+        }
+      }
+    }
+  },
+  "allOf": [
+    {
+      "$ref": "#/definitions/metricdefinition"
+    },
+    {
+      "$ref": "https://ns.adobe.com/xdm/data/metricdefinition"
+    }
+  ],
+  "required": [
+    "@id",
+    "schema:name",
+    "xdm:measurement",
+    "xdm:unit"
+  ],
+  "meta:status": "stabilizing"
+}
diff --git a/schemas/data/stall-time.schema.json b/schemas/data/stall-time.schema.json
new file mode 100644
index 0000000000..dc4b7bb3ea
--- /dev/null
+++ b/schemas/data/stall-time.schema.json
@@ -0,0 +1,56 @@
+{
+  "meta:license": [
+    "Copyright 2018 Adobe Systems Incorporated. All rights reserved.",
+    "This work is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license",
+    "you may not use this file except in compliance with the License. You may obtain a copy",
+    "of the License at https://creativecommons.org/licenses/by/4.0/"
+  ],
+  "$id": "https://ns.adobe.com/xdm/data/stall-time",
+  "$schema": "http://json-schema.org/draft-06/schema#",
+  "title": "Stall Time",
+  "type": "object",
+  "meta:extensible": true,
+  "meta:extends": [
+    "https://ns.adobe.com/xdm/data/metricdefinition"
+  ],
+  "description": "Describes the duration in which the playback was stalled during playback.",
+  "definitions": {
+    "metricdefinition": {
+      "properties": {
+        "@id": {
+          "type": "string",
+          "const": "xdm:stallTime",
+          "description": "The unique identifier of this metric."
+        },
+        "schema:name": {
+          "type": "string",
+          "const": "metric: stallTime",
+          "description": "Describes the duration in which the playback was stalled during playback."
+        },
+        "xdm:measurement": {
+          "type": "string",
+          "description": "How to take measures of this metric.",
+          "const": "count"
+        },
+        "xdm:unit": {
+          "const": null
+        }
+      }
+    }
+  },
+  "allOf": [
+    {
+      "$ref": "#/definitions/metricdefinition"
+    },
+    {
+      "$ref": "https://ns.adobe.com/xdm/data/metricdefinition"
+    }
+  ],
+  "required": [
+    "@id",
+    "schema:name",
+    "xdm:measurement",
+    "xdm:unit"
+  ],
+  "meta:status": "stabilizing"
+}
diff --git a/schemas/data/stalls.schema.json b/schemas/data/stalls.schema.json
new file mode 100644
index 0000000000..844be990cb
--- /dev/null
+++ b/schemas/data/stalls.schema.json
@@ -0,0 +1,56 @@
+{
+  "meta:license": [
+    "Copyright 2018 Adobe Systems Incorporated. All rights reserved.",
+    "This work is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license",
+    "you may not use this file except in compliance with the License. You may obtain a copy",
+    "of the License at https://creativecommons.org/licenses/by/4.0/"
+  ],
+  "$id": "https://ns.adobe.com/xdm/data/stalls",
+  "$schema": "http://json-schema.org/draft-06/schema#",
+  "title": "Stalls",
+  "type": "object",
+  "meta:extensible": true,
+  "meta:extends": [
+    "https://ns.adobe.com/xdm/data/metricdefinition"
+  ],
+  "description": "The number of stall states that occurred during a playback session.",
+  "definitions": {
+    "metricdefinition": {
+      "properties": {
+        "@id": {
+          "type": "string",
+          "const": "xdm:stalls",
+          "description": "The unique identifier of this metric."
+        },
+        "schema:name": {
+          "type": "string",
+          "const": "metric: stalls",
+          "description": "The number of stall states that occurred during a playback session."
+        },
+        "xdm:measurement": {
+          "type": "string",
+          "description": "How to take measures of this metric.",
+          "const": "count"
+        },
+        "xdm:unit": {
+          "const": null
+        }
+      }
+    }
+  },
+  "allOf": [
+    {
+      "$ref": "#/definitions/metricdefinition"
+    },
+    {
+      "$ref": "https://ns.adobe.com/xdm/data/metricdefinition"
+    }
+  ],
+  "required": [
+    "@id",
+    "schema:name",
+    "xdm:measurement",
+    "xdm:unit"
+  ],
+  "meta:status": "stabilizing"
+}
diff --git a/schemas/data/starts.schema.json b/schemas/data/starts.schema.json
index e20693ea02..c8f229d122 100644
--- a/schemas/data/starts.schema.json
+++ b/schemas/data/starts.schema.json
@@ -11,7 +11,7 @@
   "type": "object",
   "meta:extensible": true,
   "meta:extends": ["https://ns.adobe.com/xdm/data/metricdefinition"],
-  "description": "The metric starts describes a digital video which started playing.",
+  "description": "Indicates the first frame of the timed media was viewed - i.e. the viewer did not abandon during pre-roll ad, buffering, etc.",
   "definitions": {
     "metricdefinition": {
       "properties": {
@@ -24,7 +24,7 @@
           "type": "string",
           "const": "metric: starts",
           "description":
-          "The metric starts describes a digital video which started playing."
+          "Indicates the first frame of the timed media asset was viewed - i.e. the viewer did not abandon during pre-roll ad, buffering, etc."
         },
         "xdm:measurement": {
           "type": "string",
diff --git a/schemas/data/time-played.schema.json b/schemas/data/time-played.schema.json
new file mode 100644
index 0000000000..84a008fb7d
--- /dev/null
+++ b/schemas/data/time-played.schema.json
@@ -0,0 +1,56 @@
+{
+  "meta:license": [
+    "Copyright 2018 Adobe Systems Incorporated. All rights reserved.",
+    "This work is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license",
+    "you may not use this file except in compliance with the License. You may obtain a copy",
+    "of the License at https://creativecommons.org/licenses/by/4.0/"
+  ],
+  "$id": "https://ns.adobe.com/xdm/data/time-played",
+  "$schema": "http://json-schema.org/draft-06/schema#",
+  "title": "Time Played",
+  "type": "object",
+  "meta:extensible": true,
+  "meta:extends": [
+    "https://ns.adobe.com/xdm/data/metricdefinition"
+  ],
+  "description": "Describes the amount of time spent by a user on a specific timed media asset.",
+  "definitions": {
+    "metricdefinition": {
+      "properties": {
+        "@id": {
+          "type": "string",
+          "const": "xdm:timePlayed",
+          "description": "The unique identifier of this metric."
+        },
+        "schema:name": {
+          "type": "string",
+          "const": "metric: timePlayed",
+          "description": "Describes the amount of time spent by a user on a specific timed media asset."
+        },
+        "xdm:measurement": {
+          "type": "string",
+          "description": "How to take measures of this metric.",
+          "const": "time"
+        },
+        "xdm:unit": {
+          "const": "second"
+        }
+      }
+    }
+  },
+  "allOf": [
+    {
+      "$ref": "#/definitions/metricdefinition"
+    },
+    {
+      "$ref": "https://ns.adobe.com/xdm/data/metricdefinition"
+    }
+  ],
+  "required": [
+    "@id",
+    "schema:name",
+    "xdm:measurement",
+    "xdm:unit"
+  ],
+  "meta:status": "stabilizing"
+}
diff --git a/schemas/data/time-to-start.schema.json b/schemas/data/time-to-start.schema.json
new file mode 100644
index 0000000000..459924d952
--- /dev/null
+++ b/schemas/data/time-to-start.schema.json
@@ -0,0 +1,56 @@
+{
+  "meta:license": [
+    "Copyright 2018 Adobe Systems Incorporated. All rights reserved.",
+    "This work is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license",
+    "you may not use this file except in compliance with the License. You may obtain a copy",
+    "of the License at https://creativecommons.org/licenses/by/4.0/"
+  ],
+  "$id": "https://ns.adobe.com/xdm/data/time-to-start",
+  "$schema": "http://json-schema.org/draft-06/schema#",
+  "title": "Time to Start",
+  "type": "object",
+  "meta:extensible": true,
+  "meta:extends": [
+    "https://ns.adobe.com/xdm/data/metricdefinition"
+  ],
+  "description": "Describes the duration passed between video load and start.",
+  "definitions": {
+    "metricdefinition": {
+      "properties": {
+        "@id": {
+          "type": "string",
+          "const": "xdm:timeToStart",
+          "description": "The unique identifier of this metric."
+        },
+        "schema:name": {
+          "type": "string",
+          "const": "metric: timeToStart",
+          "description": "Describes the duration passed between video load and start."
+        },
+        "xdm:measurement": {
+          "type": "string",
+          "description": "How to take measures of this metric.",
+          "const": "time"
+        },
+        "xdm:unit": {
+          "const": "second"
+        }
+      }
+    }
+  },
+  "allOf": [
+    {
+      "$ref": "#/definitions/metricdefinition"
+    },
+    {
+      "$ref": "https://ns.adobe.com/xdm/data/metricdefinition"
+    }
+  ],
+  "required": [
+    "@id",
+    "schema:name",
+    "xdm:measurement",
+    "xdm:unit"
+  ],
+  "meta:status": "stabilizing"
+}
diff --git a/schemas/data/total-time-played.schema.json b/schemas/data/total-time-played.schema.json
new file mode 100644
index 0000000000..cdc3823a0a
--- /dev/null
+++ b/schemas/data/total-time-played.schema.json
@@ -0,0 +1,56 @@
+{
+  "meta:license": [
+    "Copyright 2018 Adobe Systems Incorporated. All rights reserved.",
+    "This work is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license",
+    "you may not use this file except in compliance with the License. You may obtain a copy",
+    "of the License at https://creativecommons.org/licenses/by/4.0/"
+  ],
+  "$id": "https://ns.adobe.com/xdm/data/total-time-played",
+  "$schema": "http://json-schema.org/draft-06/schema#",
+  "title": "Total Time Played",
+  "type": "object",
+  "meta:extensible": true,
+  "meta:extends": [
+    "https://ns.adobe.com/xdm/data/metricdefinition"
+  ],
+  "description": "Describes the total amount of time spent by a user on a specific timed media asset, which includes time spent watching ads.",
+  "definitions": {
+    "metricdefinition": {
+      "properties": {
+        "@id": {
+          "type": "string",
+          "const": "xdm:totalTimePlayed",
+          "description": "The unique identifier of this metric."
+        },
+        "schema:name": {
+          "type": "string",
+          "const": "metric: totalTimePlayed",
+          "description": "Describes the total amount of time spent by a user on a specific timed media asset, which includes time spent watching ads."
+        },
+        "xdm:measurement": {
+          "type": "string",
+          "description": "How to take measures of this metric.",
+          "const": "time"
+        },
+        "xdm:unit": {
+          "const": "second"
+        }
+      }
+    }
+  },
+  "allOf": [
+    {
+      "$ref": "#/definitions/metricdefinition"
+    },
+    {
+      "$ref": "https://ns.adobe.com/xdm/data/metricdefinition"
+    }
+  ],
+  "required": [
+    "@id",
+    "schema:name",
+    "xdm:measurement",
+    "xdm:unit"
+  ],
+  "meta:status": "stabilizing"
+}