[DCRM-L] Double leaves

[Manon Theroux]

My understanding is that they are very different things.

A simple folded plate is one that can actually be unfolded (i.e. the plate
is folded to the size of the textblock but only bound along one edge - you
have to manually unfold the free edge to see what's inside). So, a single
unnumbered folded plate with content on one side would be:

[1] folded leaf of plates

A "double leaf" cannot be unfolded (i.e. typically the fold is along the
fore edge and the two edges opposite the fold have been bound, so that the
folded leaf is essentially functioning as a single leaf of double thickness
with its interior facing pages blank). The latter is common with East Asian
bindings -  the whole book is likely to consist of double leaves. Although
double leaves are technically folded, I think they have traditionally not
been described as such in area 5 because they function as single leaves -
you turn them just like the leaves of a "regular" book and there is nothing
to unfold. So, an unnumbered double leaf with content on one side would be:

[1] leaf

And both of the above are to be distinguished from a "double plate" (i.e. a
single plate bound along its center fold, creating a "double spread" when
you turn to it). Again, although the plate is technically folded, it is
bound along the fold (or attached to a stub in the binding), so you can
turn each side of the double plate as if it were its own separate plate and
you don't actually have to unfold anything. I think it is somewhat
analogous to describing a bifolium as two leaves despite the fact that they
are technically joined by a fold. So, an unnumbered double plate with
content on one side would be:

[2] leaves of plates

In the DCRM(C) draft, we currently have definitions that distinguish
between a double leaf and a double plate (or try to - suggestions for
improvements are welcome as I think we're not 100% happy with them -
pictures would make it all so much easier!):

Double leaf. A leaf of double size with a fold at the fore edge or top edge
of the resource. Typically, the folded leaf is bound at the inner margin
and functions as a single leaf of double thickness. The exterior of the
folded leaf may be drawn or printed on one or both sides; the interior of
the folded leaf is blank.

Double plate. A plate of double size with a vertical fold down its center,
along which it has been bound. The plate typically features a large single
map or other illustration that extends across facing pages when the volume
is opened.

Apologies if I've misunderstood anything!

Manon

--

Manon Théroux
Head of Technical Services
U.S. Senate Library
Washington, DC 20510
(202) 224-3833





On Sun, Jun 28, 2015 at 2:53 PM, Deborah J. Leslie <DJLeslie at folger.edu>
wrote:

>  Is there any useful reason to maintain separate treatment of folded
> leaves of plates vs. double leaves?
>
>
>
> DCRM(B)
>
>
>
> 5B9.3. Leaves or pages of plates
>
> Record folded leaves as leaves or pages of plates
> <http://desktop.loc.gov/search?view=document&doc_action=setdoc&doc_keytype=foliodestination&doc_key=dcrmbPlateSLASHglossary&hash=PlateSLASHglossary&fq=myresources%7Ctrue>.
> Make a note to indicate any folded letterpress
> <http://desktop.loc.gov/search?view=document&doc_action=setdoc&doc_keytype=foliodestination&doc_key=dcrmbLetterpressSLASHglossary&hash=LetterpressSLASHglossary&fq=myresources%7Ctrue>
> leaves, if considered important
> <http://desktop.loc.gov/search?view=document&doc_action=setdoc&doc_keytype=foliodestination&doc_key=dcrmbIfSPACEconsideredSPACEimportant&hash=IfSPACEconsideredSPACEimportant&fq=myresources%7Ctrue>.
>
>
> 50, [2] p., [2] folded leaves of plates
>
> Optional note
> <http://desktop.loc.gov/search?view=document&doc_action=setdoc&doc_keytype=foliodestination&doc_key=dcrmbOptionalSPACEnote&hash=OptionalSPACEnote&fq=myresources%7Ctrue>
> : The folded leaves are letterpress
> <http://desktop.loc.gov/search?view=document&doc_action=setdoc&doc_keytype=foliodestination&doc_key=dcrmbLetterpressSLASHglossary&hash=LetterpressSLASHglossary&fq=myresources%7Ctrue>
> tables
>
>
>
> 5B11. Double leaves
> <http://desktop.loc.gov/search?&view=document&doc_action=setdoc&doc_keytype=foliodestination&doc_key=aacr22PERIOD5B11&hash=2PERIOD5B11&fq=myresources%7Ctrue>
>
> Count numbered double leaves (leaves with fold at either top or fore edge
> and bound at the inner margin) as pages or as leaves according to their
> numbering. Count unnumbered double leaves as pages (2 printed pages per
> double leaf) or as leaves (1 printed page per double leaf). Always
> indicate the presence of double leaves in a note.
>
> [36] p.
>
> Note
> <http://desktop.loc.gov/search?view=document&doc_action=setdoc&doc_keytype=foliodestination&doc_key=dcrmbNote&hash=Note&fq=myresources%7Ctrue>
> : Printed on double leaves
>
> [18] leaves
>
> Note
> <http://desktop.loc.gov/search?view=document&doc_action=setdoc&doc_keytype=foliodestination&doc_key=dcrmbNote&hash=Note&fq=myresources%7Ctrue>
> : Printed on 18 double leaves
>
> 72 p., 1 leaf of plates
>
> Note
> <http://desktop.loc.gov/search?view=document&doc_action=setdoc&doc_keytype=foliodestination&doc_key=dcrmbNote&hash=Note&fq=myresources%7Ctrue>
> : Plate
> <http://desktop.loc.gov/search?view=document&doc_action=setdoc&doc_keytype=foliodestination&doc_key=dcrmbPlateSLASHglossary&hash=PlateSLASHglossary&fq=myresources%7Ctrue>
> printed on a double leaf
>
>
>
> Deborah J. Leslie, for the DCRM/RDA Task Group
>
>
>
>
>
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