Document data submission

[mdlincoln]

• create page on data submission, how to contact editors with conference/series info etc.
• link to sample XML file
• link to DTD if/when available

[mdlincoln]

Sample XML file url: https://dh-abstracts.library.cmu.edu/static/tei/valid_tei/abstract_tei.xml
XMLSchema valdiation file: https://dh-abstracts.library.cmu.edu/static/tei/schema/dh_tei.xsd

[mdlincoln]

Location of two test TEI folders: valid_tei that can be uploaded as a zip file, and invalid_tei that will produce expected error messages: https://github.com/cmu-lib/dhweb_app/tree/master/dh_abstracts/app/abstracts/static/tei