Linking is dependent on the request and the technical possibilities of 
the targeted publisher. Very often on article level.

Were not possible on journal level.

The things the EZB can't do is resolve identifiers like PMIDs, DOIs, 
SICI numbers. But you can do that easily by writing your own application 
or you my application I did write for this purpose:

http://sourceforge.net/projects/doctor-doc/ (use SVN for best results).

The API of the services of the EZB/ZDB is located here:

http://services.d-nb.de/fize-service/gvr/full.xml?sid=nameMe:myOrganisation&genre=article&issn=0392-4203&date=2004

You may extend that to article level (try another journal).

Result 0 => free accessible
Result 1 => partially free accessible (fuzziness because of a not 
specific request, e.g. missing year)
Result 2 => licensed
Result 3 => partially licensed
Result 4 => not licensed
Result 5 => Journal found, but the year specified is outside of the 
published range)
Result 10 => unknown

You'll find a german documentation here:

http://www.zeitschriftendatenbank.de/fileadmin/user_upload/ZDB/pdf/services/JOP_Dokumentation_XML-Dienst.pdf

They state that you should contact the EZB/ZDB to register your sid 
(Vendor-ID:Database-ID) if you want to use this service: 
[log in to unmask]

Markus

PS: the data of the EZB isn't available for download, as far as I know. 
But the EZB is for sure one of the best things libraries ever have 
achieved and maintain...

Am 17.02.2011 17:25, schrieb Ross Singer:
> On Thu, Feb 17, 2011 at 11:16 AM, Jonathan Rochkind<[log in to unmask]>  wrote:
>> Interesting, does their link resolver API do article-level links, or just
>> journal title level links?
>>
>> I/you/one could easily write a plugin for Umlaut for their API, would be an
>> interesting exersize.
>
> I think it would also be interesting to make the data available for
> download/reuse, if possible.
>
> -Ross.
>>
>> On 2/17/2011 1:18 AM, Markus Fischer wrote:
>>>
>>> The cheapest and best A to Z list i know is the german EZB:
>>>
>>>
>>> http://rzblx1.uni-regensburg.de/ezeit/index.phtml?bibid=AAAAA&colors=7&lang=en
>>>
>>> This list is maintained by hunderds of libraries. You just mark those
>>> journals you have licensed and that's it.
>>>
>>> Not very widely known: they do also provide an API which you can use as
>>> a free linkresolver. There are free tools you can plug into this API and
>>> you've got your linkresolver.
>>>
>>> The list is incredible accurate and you'll have almost no effort: any
>>> change made by one library is valid for all.
>>>
>>> Let me know if you need more information.
>>>
>>> Markus Fischer
>>>
>>> Am 16.02.2011 22:18, schrieb Michele DeSilva:
>>>>
>>>> Hi Code4Lib-ers,
>>>>
>>>> I want to chime in and say that I, too, enjoyed the streaming archive
>>>> from the conference.
>>>>
>>>> I also have a question: my library has a horribly antiquated A to Z list
>>>> of databases and online resources (it's based in Access). We'd like to do
>>>> something that looks more modern and is far more user friendly. I found a
>>>> great article in the Code4Lib journal (issue 12, by Danielle Rosenthal&
>>>> Mario Bernado) about building a searchable A to Z list using Drupal. I'm
>>>> also wondering what other institutions have done as far as in-house
>>>> solutions. I know there're products we could buy, but, like everyone else,
>>>> we don't have much money at the moment.
>>>>
>>>> Thanks for any info or advice!
>>>>
>>>> Michele DeSilva
>>>> Central Oregon Community College Library
>>>> Emerging Technologies Librarian
>>>> 541-383-7565
>>>> [log in to unmask]
>>