Hi Jörg,

Yes you understand perfectly, that is exactly my proposal :) 


On Sat, Nov 8, 2014 at 9:57 AM, [log in to unmask] <[log in to unmask]> wrote:
do I understand it correctly? Instead of

<w> a Work ;
  bf:issn <i> .
<i> a Identifier ;
  rdf:value "1234567890" .

we should better think about something like this?

<w> a Work ;
  bf:identifier <i> .
<i> a ISSNIdentifier ;
  rdf:value "1234567890" .

I'd prefer the latter, instead of inflating Bibframe with concrete identifier properties like bf:issn, bf:isbn etc. there is just a common bf:identifier property. 
(Not only for bf identifiers, this construction can be generalized).

Rob Sanderson
Technology Collaboration Facilitator
Digital Library Systems and Services
Stanford, CA 94305