This directory contains the schema for validating Blockly XML files:
* blockly.xsd

Also included are three sample XML files:
* workspace.xml - XML for a complicated workspace.
* toolbox.xml   - XML for a complicated toolbox with categories and separators.
* invalid.xml   - XML that violates the DTD.

Testing can be performed using an online tool:
https://www.corefiling.com/opensource/schemaValidate/
http://www.utilities-online.info/xsdvalidation/