background image
which allows us to distinguish clearly the two different entities involved.Thus, the 1:N relation
is preferable, which Rawles also implicitly suggests by distinguishing between book and emblem
information.All other quantifiers Rawles has indicated by assigning "single" or "multiple" to each
category in the third column of his table. If we adopted the 1:N structure, it would result in par-
ticular OAI-responses. For instance, on basis of the 1:N relation a GetRecord-OAI request would
respond by a complete emblem book or at least a sequence of pages and emblems. A "record"
would, thus, mean a collection of emblems rather than a single emblem, making it nearly impos-
sible to retrieve single emblems from the OAI repository. Although there may be some doubts
about whether this is the most practical method of harvesting emblem metadata, I feel that it suits
the needs of the emblem community best. It simply does not make much sense to retrieve sin-
gle emblems, even if they are enriched by bibliographic data, because a single emblem can only
be evaluated properly in the presence of the full sequence of other emblems found in the same
source.Therefore, the most meaningful response to a GetRecord request should be a long list of
emblem metadata encapsulated by bibliographic information about the work:
<bibliografic information>
<bibliographic information>
Another basic structural issue should be mentioned.Within a book one can encode either the
sequence of emblems or the sequence of pages, that is, the book structure.The main difference is
that the latter may imply encoding preface, chapters, indexes, etc. If not, it means at least that the
encoder will follow the page sequence rather than the emblem sequence. This difference in
encoding structure becomes an issue, when parts of the emblem occur in different locations in
the book. For example, there might first be a page of mottos, referring to the corresponding pic-
turae on another page.When encoding the page sequence, the encoder would first encode all of
the mottos, then the picturae:
<motto ref="emblem No 1"/>
<motto ref="emblem No 2"/>
<motto ref="emblem No 3"/>
<pictura ref="emblem No 1"/>
<pictura ref="emblem No 2"/>
<pictura ref="emblem No 3"/>
See, for example, http://diglib.hab.
image=000011 und 000012;
titlepage: 000008.
DC_Emblemsbook_180204 19.02.2004 11:26 Uhr Seite 92