On Jan 13, 2015 11:19 AM, "Robert Sanderson" <[log in to unmask]> wrote:

> I'm less concerned about exact definitions and more about the last case
of HeldItem as a subClass of Annotation.  Regardless of the exact
definition, I suggest that it is impossible for the same resource to be
both a real world physical object and a digital annotation at the same

> [...] much less important than the fundamental inventory recording
capabilities of the ontology.

Given the assumptions made by the rest of BIBFRAME...

If you were any more bang on, you would be surrounded by the black and
white Fictitious Spirits of a thousand librarian stereotypes going
'shhhhhhhh' [1]

In order to perform an inventory, it is important to be able to count all
the things.  Because it is an annotation, HeldItem, brought in to counter
criticisms raised over the original Holding-as-Annotation, fails to solve
the original problem, which is that there is nothing in the Ontology of
BIBFRAME that corresponds to the thing that you can drop on your foot,
hardback,paperback, or machine-rack.

Two bibframe Annotations made by two different annotators are two different
annotations. They might refer to the same entity, and have the same
contents, but they are just as distinct as two different annotators giving
a work a 4-star rating.

There may be something in the annotation that allows you to infer that
there is some thing, outside the bibframe universe, that they both refer
to, but those things lurk outside the BIBFRAME universe.

The most plausible definition of BIBFRAME Annotations is  as carriers for
information not directly contained within a MARC 21 bibliographic record.

Table of contents information is an exception which proves the rule; there
is a note field (505) that can hold TOCs small enough to fit in a Z39.2
formatted record.  However, the table of contents in a 505 may be stored by
reference (via the $u);  indirect tables of conference may also be linked
to via an 856 field.  Similarly, summary information might be provided
through a 520, but might be indirectly linked to via an 856.

See for an example of both uses of 856.


[1] Plus one cybrarian going 'ssh'.