epub output metadata

troymc · 05-21-2010, 01:22 PM

Not sure if this has been brought up before - but I didn't find it in a search.

Calibre seems like it may have an issue with multiple dc:creator entries with differing opf:role's.

As an example:

Zelda Pinwheel's "Three Men in a Boat" epub has 2 dc:creator entries, one author & one illustrator:

Code:

<dc:creator opf:role="aut" opf:file-as="Jerome, Jerome K.">Jerome K. Jerome</dc:creator>

<dc:creator opf:role="ill" opf:file-as="Frederics, A.">A. Frederics</dc:creator>

When imported into Calibre, it only lists Jerome as the author - which I think would be Ok. (a book with multiple dc:creator opf:role="aut" entries will show up with multiple authors as expected)

However, when Calibre updates the metadata in the epub to send it to a device (or save to disk, etc) it ends up sending the illustrator as the only author:

Code:

<dc:creator opf:role="ill" opf:file-as="Frederics, A.">A. Frederics</dc:creator>

Troy

kovidgoyal · 05-21-2010, 04:42 PM

It doesn't do that. Look down in the OPF file the role="aut" entry will be near the bottom of the <metadata> section.

troymc · 05-21-2010, 05:33 PM

Quote:

Originally Posted by kovidgoyal

It doesn't do that. Look down in the OPF file the role="aut" entry will be near the bottom of the <metadata> section.

Oops, I see that now!

hmmm...well after Calibre sends it to my 505, both the Sony & Calibre show the author as 'A. Fredericks'.

So, I'm guessing then that the Sony is probably picking the 1st dc:creator to use as the author -- and that's the author Calibre shows when looking at the device - not necessarily the one from the epub?

Troy

kovidgoyal · 05-21-2010, 07:50 PM

yup sony only supports a single author.

troymc · 05-21-2010, 11:36 PM

gah! I hate having to work around broken implementations - like ADE & Sony firmware - particularly when they're so slow and seemingly reluctant to fix anything.

Can someone tell me if the newer Sony model's firmware suffers from this bug? Do other ereaders see this?

Now that I'm aware of this I see many other instances of this in my libraries - Plato's works showing up with translators as authors, a collection of John Locke's works showing with the editor as the author, etc.

From what I can tell, the OPF standard requires no specific order to metadata elements. Unfortunately, if there is a de-facto standard being set that the first listed dc:creator is the "primary author" [that may be an overly-broad statement] it may need to be worked around until there is a fix in the standard [ie. a way to specify primary author.]

Can Calibre *not* re-order the metadata when it updates it? It looks like it's removing the original entries and then re-adds them at the bottom of the metadata section.

Troy

kovidgoyal · 05-22-2010, 12:23 AM

Easy enough to do

05-21-2010, 01:22 PM	#1
troymc Groupie Posts: 161 Karma: 608 Join Date: Aug 2008 Location: Plano, TX Device: Sony PRS-505 + B&N Nook + Motion LE1700 + Motorola Xoom Wifi	epub output metadata Not sure if this has been brought up before - but I didn't find it in a search. Calibre seems like it may have an issue with multiple dc:creator entries with differing opf:role's. As an example: Zelda Pinwheel's "Three Men in a Boat" epub has 2 dc:creator entries, one author & one illustrator: Code: <dc:creator opf:role="aut" opf:file-as="Jerome, Jerome K.">Jerome K. Jerome</dc:creator> <dc:creator opf:role="ill" opf:file-as="Frederics, A.">A. Frederics</dc:creator> When imported into Calibre, it only lists Jerome as the author - which I think would be Ok. (a book with multiple dc:creator opf:role="aut" entries will show up with multiple authors as expected) However, when Calibre updates the metadata in the epub to send it to a device (or save to disk, etc) it ends up sending the illustrator as the only author: Code: <dc:creator opf:role="ill" opf:file-as="Frederics, A.">A. Frederics</dc:creator> Troy

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05-21-2010, 04:42 PM	#2
kovidgoyal creator of calibre Posts: 45,164 Karma: 27110894 Join Date: Oct 2006 Location: Mumbai, India Device: Various	It doesn't do that. Look down in the OPF file the role="aut" entry will be near the bottom of the <metadata> section.

05-21-2010, 07:50 PM	#4
kovidgoyal creator of calibre Posts: 45,164 Karma: 27110894 Join Date: Oct 2006 Location: Mumbai, India Device: Various	yup sony only supports a single author.

05-21-2010, 11:36 PM	#5
troymc Groupie Posts: 161 Karma: 608 Join Date: Aug 2008 Location: Plano, TX Device: Sony PRS-505 + B&N Nook + Motion LE1700 + Motorola Xoom Wifi	gah! I hate having to work around broken implementations - like ADE & Sony firmware - particularly when they're so slow and seemingly reluctant to fix anything. Can someone tell me if the newer Sony model's firmware suffers from this bug? Do other ereaders see this? Now that I'm aware of this I see many other instances of this in my libraries - Plato's works showing up with translators as authors, a collection of John Locke's works showing with the editor as the author, etc. From what I can tell, the OPF standard requires no specific order to metadata elements. Unfortunately, if there is a de-facto standard being set that the first listed dc:creator is the "primary author" [that may be an overly-broad statement] it may need to be worked around until there is a fix in the standard [ie. a way to specify primary author.] Can Calibre not re-order the metadata when it updates it? It looks like it's removing the original entries and then re-adds them at the bottom of the metadata section. Troy

05-22-2010, 12:23 AM	#6
kovidgoyal creator of calibre Posts: 45,164 Karma: 27110894 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Easy enough to do

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