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

[Larry Lannom <llannom@cnri.reston.va.us>]

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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