Re: [Handle-info] resolving to specific metadata types

["Hammond, Tony" <t.hammond@nature.com>]

Hi Larry:

Would just like to add in passing that this idea of using OpenURL as a
service access point is also being kicked around in the ongoing work on
OAI-ORE, the Object Reuse and Exchange project which is being conducted
under the auspices of the Open Archives Initiative, see

    http://www.openarchives.org/ore/

Essentially this project is concerned with the exchange of "digital objects"
between repositories and has much to learn from the existing work on
accessing data stored away in handle records.

Cheers,

Tony



On 15/2/07 17:56, "Larry Lannom" <llannom@cnri.reston.va.us> wrote:15/2/07
17:56

> Following up on this topic - the idea of using OpenURL as a generic
> approach to passing arguments to web-to-handle proxy servers has come
> up a number of times. Reaction to that idea from this list would be
> welcome. Thanks.
> 
> Larry
> 
> 
> On Feb 15, 2007, at 11:55 AM, Sean Reilly wrote:
> 
>> Hi Richard,
>> 
>> This really depends on how you are resolving the handle.  Are you
>> using the Java API or do you want to know how to redirect a browser
>> to different values using the handle proxy (http://hdl.handle.net)?
>> 
>> If you are using the proxy, you can tell hdl.handle.net to use
>> certain parameters when it does its handle resolution, and querying
>> for specific types of handles values is one way to do that.  I
>> don't think the "type" parameter (or any parameters for that
>> matter) are officially supported by the proxy, but they do
>> currently work.  For example, you could do:
>>   http://hdl.handle.net/123/456?type=XYZ
>> 
>> but that may not help you much since all the proxy does is pass the
>> type through to the native handle resolver and display the result.
>> If the type of any resulting handle values is "URL" or begins with
>> "URL." then the proxy will send an HTTP redirect message back to
>> the browser with the data part of the handle value as the
>> destination URL.  So you could add a handle value with a type of
>> "URL.XML" to a handle and make links like the one above except
>> with ?type=URL.XML.
>> 
>> I don't necessarily recommend using either "URL.XML" or "XML" as
>> handle value types, and I would be very careful about any new types
>> that you use since they are hard to change once links to them have
>> been spread around.  But hopefully you are referring to "real"
>> resolution using the Java or C API in which you can be much more
>> flexible.  If that's the case, let me know what language you're
>> using and I'll send an example.
>> 
>> Thanks,
>> Sean
>> 
>> On Feb 15, 2007, at 9:06 AM, richard wrote:
>> 
>>> I would like to know what needs to be specified in the handle
>>> identifier to obtain specific types of metadata. For example, if
>>> handle 123/456 has  2 sets of data, one url and one XML, how would
>>> I specify that I want the XML ? 123/456/xml ?
>>> 
>>> Thanks,
>>> Richard.
>>> 
>>> _______________________________________________
>>> Handle-Info mailing list
>>> Handle-Info@cnri.reston.va.us
>>> http://www.handle.net/mailman/listinfo/handle-info
>> 
> 
> 
> 
> 
> =========================================
> Larry Lannom
> Director of Information Management Technology
> Corporation for National Research Initiatives (CNRI)
> Suite 100, 1895 Preston White Dr, Reston, VA 20191
> 
> email:  llannom@cnri.reston.va.us
> web: www.cnri.reston.va.us
> tel:  703 620 8990
> 
> 
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