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Amanda � let me preface this by saying that you�re free to use any prefix  you want when creating BIBFRAME RDF, as long as you bind it to the proper namespace.  You could use bf:, bf2:, or xyz:

Having said that, the preferred prefix for BIBFRAME 2 is �bf:� .  We discourage the use of bf2:, but you�re free to use it if you choose.  To distinguish BIBFRAME 2 from BIBFRAME 1, we suggest using the prefix bf1: for BIBFRAME 1, but again, you�re free to use bf:, as long as you bind it to the BIBFRAME 1 namespace.

An OWL ontology can declare a preferred prefix (via axiom preferredPrefix I think), which is non-binding of course.  You mention �variations� of BIBFRAME � each is free to declare whatever preferred prefix they like, including �bf:�.

There is no reason to - and in fact one should not � try to differentiate vocabularies by assigning unique prefixes.  Namepace URIs are unique, prefixes need not be.

Ray

From: Bibliographic Framework Transition Initiative Forum [mailto:[log in to unmask]] On Behalf Of Xu, Amanda
Sent: Thursday, May 26, 2016 4:07 PM
To: [log in to unmask]
Subject: Re: [BIBFRAME] bf:mainTitle

Hi

Thanks a lot for the explanation!  There are several variations of BIBFRAME vocabulary, e.g. http://bibframe.org/vocab/, http://bibfra.me/vocab/lite/, http://bibframe.org/vocab2/, etc.  Shall we differentiate them by using prefix {bf:} for http://bibframe.org/vocab/, prefix {bf2:} for http://bibframe.org/vocab2/, etc.?

If so, the example for bf:mainTitle will become bf2:mainTitle.  How do you think?

Thanks!

Amanda


From: Bibliographic Framework Transition Initiative Forum [mailto:[log in to unmask]] On Behalf Of Denenberg, Ray
Sent: Thursday, May 26, 2016 11:26 AM
To: [log in to unmask]<mailto:[log in to unmask]>
Subject: Re: [BIBFRAME] bf:mainTitle

Joe,  consider the following excerpt from a MODS record:
<titleInfo>
<title>Private Eyeballs</title>
<subTitle>a golden treasury of bad taste</subTitle>
</titleInfo>

�. and note that  <title> in MODS corresponds to BIBFRAME mainTitle so you could look at this as:
<titleInfo>
<mainTitle>Private Eyeballs</mainTitle>
<subTitle>a golden treasury of bad taste</subTitle>
</titleInfo>
(Even though there is no <mainTitle> element in MODS, pretend there is.)

So if you want to make this into a BIBFRAME title, the lazy way to do it might be to construct a title string from the main and sub title:

bf:title [rdfs:label �Private Eyeballs - a golden treasury of bad taste�]


Or, you could parse out the main and sub titles:

bf:title [
bf:mainTitle "Private Eyeballs" ;
bf:subtitle "golden treasury of bad taste" ] .

Or you could provide both the title string as well as the parsed title:

bf:title [
rdfs:label �Private Eyeballs - a golden treasury of bad taste� ;
bf:mainTitle "Private Eyeballs" ;
bf:subtitle "golden treasury of bad taste" ]  .


Let�s take another example.  In this MODS record, only the main title is expressed:

<titleInfo>
     <title>Reflexive interpreters and autobiographical texts</title>
</titleInfo>

So the mainTitle is �Reflexive interpreters and autobiographical texts�.  You could express this in BIBFRAME as the mainTitle, but only if you use that string verbatim.
You could express the string:
     �Reflexive interpreters and autobiographical texts � English � 1977�

But in this case you would express it as a label, not as the mainTitle because it is not the main title.

Hope that helps.

Ray



From: Bibliographic Framework Transition Initiative Forum [mailto:[log in to unmask]] On Behalf Of Joseph Kiegel
Sent: Thursday, May 26, 2016 11:34 AM
To: [log in to unmask]<mailto:[log in to unmask]>
Subject: [BIBFRAME] bf:mainTitle

It would be helpful to have more information on the use of bf:mainTitle as opposed to rdfs:label.

The Titles specification (https://www.loc.gov/bibframe/docs/pdf/bf2-titles-apr2016.pdf) uses both in the examples.  Specifically, examples 2-5 use bf:mainTitle to hold the title string.  It seems that examples 1 and 6 could as well.  The definition of bf:mainTitle is quite broad:  �Title being addressed. Possible title component�.

Alternate Example 1:


bf:title [

a bf:Title , bf:WorkTitle ;
bf:mainTitle "Reflexive interpreters and autobiographical texts" ] .


Alternate Example 6:


bf:title [

a bf:Title , bf: VariantTitle ;

bf:mainTitle �Chartbook on aging� ;
bf:variantType �spine � ] .


What are the criteria for using bf:mainTitle vs. rdfs:label?