TAPRegExt fine grained differences between tables

[Walter Landry]

Hi Everyone,

We have a variety of tables with different backends all served
through a single TAP endpoint.  Because the backends are different,
they support different optional components of TAP.  Reading the
TAPRegExt standard, is it correct to say that there is no way to
express these kind of fine-grained differences between the tables?

Thanks,
Walter Landry