Draft model for gap metadata

[swhume]

Some have expressed an interest in creating a draft model for the gap or study-specific metadata needed to complete the generation of a full Define-XML specification. Assuming we agree to do this, this task is to generate a draft model and schema for the gap/study-specific metadata.

[swhume]

Could we use USDM extensions? Maybe create a targeted extension. We may need to generate a spreadsheet to use as a UI.

Ensure alignment with CRF generation.