[#26] Add unit references mapping

[airnst]

Tickets

[#26]

Justification

Units that are cited in other publications contain this information in the element abcd:./UnitReference. In order to enable the search for datasets containing units cited, this element must be mapped correctly. Since there is no exact analogous element in the schema/bioschemas specification, it must be mapped by using the schema:citation property in combination with the JSON-LD keyword @ reverse.

Code changes

XSLT file

• Added variable for "cited by" information.
• Mapping of TitleCitation, CitationDetail and URI in a @ reverse container.

XML file

• Added examples for testing (for example for duplicates).

IPYNB file

• Line 311: Update reverse keyword.