AS2-Core Example 14 uses an unregistered token for rel value

[trwnh]

rel=thumbnail is not defined in the Link Relation registry: https://www.iana.org/assignments/link-relations/link-relations.xhtml

i am not sure if there are any more appropriate values (rel=nofollow maybe?) but using an unregistered token makes for a bad example.

[evanp]

This is a good catch! We should probably replace it with a more appropriate and registered link rel. @ThisIsMissEm noted that preview may be a sufficient candidate rel. This seems like a good possible erratum, since it is correcting an erroneous example.

Considering that the rel is not the most important part of this example, this is probably OK. However, in our next version, we may want to consider a more relevant example link-rel.