What is the "ExtensionSchema" in BCF 2.0/2.1?

[fhaag]

What is the "ExtensionSchema" in BCF 2.0/2.1?

[GeorgDangl]

Hey @fhaag, thank you for getting in touch!

I think this example should demonstrate how to use it: https://github.com/buildingSMART/BCF-XML/tree/release_3_0/Test%20Cases/v2.1/Markup/MaximumInformation/unzipped

Basically, the extension schema is an XSD schema extension for the Markup, which can be used to place further restrictions on certain types. For example, the generic string for TopicType may use an xs:restriction to limit it only to the allowed values of Issue, Information and Message.

It's a bit complicated😀

[fhaag]

Hi, thank you for the explanation.

What I did not realize was that xs:anyUri accepts an empty string, as well. Hence, if I do not want to place any "further restrictions on certain types", I can simply add an empty <ExtensionSchema/> element in the project.bcfp file and everything is valid.