Create XML scheme for description.xml

[vassiliphilippov]

AppDF specification is described here:
https://github.com/onepf/AppDF/blob/master/specification/appds_spec_1_0.md

The central place of the specification is description.xml file that is described there as well.

We need to create XML Schema based on this specification.

More about XML Schema:
http://www.w3.org/XML/Schema.html
http://en.wikipedia.org/wiki/XML_Schema
http://www.w3schools.com/schema/default.asp

Note that the specification is not final, so be ready to update the XML Schema when the specification is updated.

[vassiliphilippov]

Current version can be found here:
https://github.com/onepf/AppDF/blob/master/specification/appdf-description.xsd

The file is 50% ready

[vassiliphilippov]

Here is a good link for online XML validation checking against an XSD file:
http://www.utilities-online.info/xsdvalidation/#.UO7PIImLKGg

[vassiliphilippov]

Current status:

Done tags:
categorization
description
description-localization
content-description
availability

Still to do:
price
apk-files
requirements
store-specific
testing-instructions
consent
customer-support

[vassiliphilippov]

done