The Trusted Network Connect (TNC) is an open architecture for Network Access Control as defined by a working group of the Trusted Computing Group (TCG). On the 3rd of August, 2015, TCG published the document, “SWID Message and Attributes for IF-M”. The description of this as written on the TCG/TNC blog –
The Trusted Network Connect (TNC) Work Group defines an open solution architecture that enables network operators to enforce policies regarding endpoint integrity when granting access to a network infrastructure. Software Identification tags (SWID tags) are XML documents that identify a specific software product.
Organizations interested in learning more about how SWID tags are used within the TNC architecture can go here to get more information – http://www.trustedcomputinggroup.org/resources/tnc_swid_messages_and_attributes_for_ifm_specification