Mapping XML identifiers to a Submodel Template (instance)

[eichstaedtPTB]

In the IDTA WG "Digital Quality Documents" we are working on a Submodel Template that enables access to contents of an XML-based digital certificate. We start with digital calibration certificates (DCC) as they are fairly matured and internationally applied
https://www.ptb.de/dcc/v3.3.0/autogenerated-docs/Doku%20Oxygen%203.3.0.html

An essential element of the DCC implementation is the use of identifiers, called refTypes:
https://wiki.dcc.ptb.de/en/dccrefTypeDefinitions
These are used to identify, for example, specific elements within the document. See, for instance, this for the area of mass calibration:
https://www.ptb.de/cms/fileadmin/internet/dienstleistungen/dkd/archiv/Publikationen/Expertenberichte/DKD-E_7-2_rev1_en.pdf
Example:
5.3.15 density
density of the calibration item

Question
What is the recommended approach to include something similar in an instance of a submodel template, and what has to be prepared in the submodel template to do so?

[BirgitBoss]

There are always two ways:
a) model it, here it seems to be SubmodelElementCollection with several Property, File etc.
b) model it as a blob that contains the xml-file with the specification in it, additionally add properties containing meta information about the used format