Propose user story for XML data mapping

planning/work-items/analysis/analysis-data-mapping.md

@@ -48,12 +48,12 @@ Also known as: Mapping TD elements to messages
 
 2. XML data exchange
 
-- **Who:** Developer with XML data exchange (instead of JSON). In general any other data format which differs from JSON.
-- **What:** How to describe the XML format with DataSchemas (TD uses JSON schema means to describe data)
+- **Who:** TD designer of a Thing with XML data exchange.
+- **What:** Want to describe XML payloads in TDs (TD uses JSON Schema to describe payload data) and automatically validate XML payloads (WoT implementations use JSON Schema to validate payload data)
   - Impossible to describe XML data accurately (i.e., there is no 1:1 mapping between JSON schema and XML schema)
   - XML and/or JSON in memory while data on the wire (mapping between JSON and XML)
   - See discussions in https://github.com/w3c/wot-binding-templates/issues/139
-- **Why:** Sometimes the request/response (also of existing solutions) is done in XML. Nevertheless, one wants to describe the data properly in a TD. Moreover, validation should be possible.
+- **Why:** Include Things (including in existing solutions) that use XML as payload content type in the WoT
 
 - Sentence: **As a** developer, **I need** to support data exchange other than JSON (e.g., XML).
 - Process Stakeholders: