Implemented the data/timeseries schema

Added the eventType field.

schemas/data/time-series.example.1.json

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+{
+  "@id": "https://data.adobe.io/experienceid-123456",
+  "xdm:timestamp": "2017-09-26T15:52:25+00:00",
+  "xdm:eventType": "advertising.impressions"
+}

schemas/data/time-series.schema.json

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+{
+  "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/"
+  ],
+  "$id": "https://ns.adobe.com/xdm/data/time-series",
+  "$schema": "http://json-schema.org/draft-06/schema#",
+  "title": "Time-series Class Schema",
+  "type": "object",
+  "meta:extensible": true,
+  "meta:abstract": true,
+  "description":
+    "Time-series technical class schema. Used to indicate the behaviour of time partitioned data semantics when composed into other Classes and Schemas.",
+  "definitions": {
+    "time-series": {
+      "properties": {
+        "@id": {
+          "title": "Identifier",
+          "type": "string",
+          "format": "uri-reference",
+          "description": "A unique identifier for the time-series event."
+        },
+        "xdm:timestamp": {
+          "title": "Timestamp",
+          "type": "string",
+          "format": "date-time",
+          "description": "The time when an event or observation occurred."
+        },
+        "xdm:eventType": {
+          "title": "Event Type",
+          "type": "string",
+          "description": "The primary event type for this timeseries record.",
+          "meta:enum": {
+            "advertising.completes": "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.",
+            "advertising.timePlayed": "Describes the amount of time spent by a user on a specific timed media asset.",
+            "advertising.federated": "Indicates if an experience event was created through data federation (data sharing between customers).",
+            "advertising.clicks": "Click(s) actions on an advertisement.",
+            "advertising.conversions": "A customer pre-defined action(s) which triggers an event for performance evaluation.",
+            "advertising.firstQuartiles": "A digital video ad has played through 25% of its duration at normal speed.",
+            "advertising.impressions": "Impression(s) of an advertisement to an end user with the potential of being viewed.",
+            "advertising.midpoints": "A digital video ad has played through 50% of its duration at normal speed.",
+            "advertising.starts": "A digital video ad has started playing.",
+            "advertising.thirdQuartiles": "A digital video ad has played through 75% of its duration at normal speed.",
+            "web.webpagedetails.pageViews": "View(s) of a webpage has occurred.",
+            "web.webinteraction.linkClicks": "Click of a web-link has occurred.",
+            "commerce.checkouts": "An action during a checkout process of a product list, there can be more than one checkout event if there are multiple steps in a checkout process. If there are multiple steps the event time information and referenced page or experience is used to identify the step individual events represent in order.",
+            "commerce.productListAdds": "Addition of a product to the product list. Example a product is added to a shopping cart.",
+            "commerce.productListOpens": "Initializations of a new product list. Example a shopping cart is created.",
+            "commerce.productListRemovals": "Removal(s) of a product entry from a product list. Example a product is removed from a shopping cart.",
+            "commerce.productListReopens": "A product list that was no longer accessible(abandoned) has been re-activated by the user. Example via a re-marketing activity.",
+            "commerce.productListViews": "View(s) of a product-list has occurred.",
+            "commerce.productViews": "View(s) of a product have occurred.",
+            "commerce.purchases": "An order has been accepted. Purchase is the only required action in a commerce conversion. Purchase must have a product list referenced.",
+            "commerce.saveForLaters": "Product list is saved for future use. Example a product wish list."
+          }
+        }
+      }
+    }
+  },
+  "allOf": [
+    {
+      "$ref": "#/definitions/time-series"
+    },
+    {
+      "$ref": "https://ns.adobe.com/xdm/common/extensible#/definitions/@context"
+    }
+  ],
+  "meta:status": "experimental"
+}