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question asked: Mar 29 '21, 10:09 a.m.
question was seen: 582 times
last updated: Apr 08 '21, 3:48 a.m.

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Advise to Query Requirement in RM-Project (part of a Global Configuration)

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magnus Elfving (34●6) | asked Mar 29 '21, 10:09 a.m. 
Hi,
I am querying (for the first time) a RM-project for attribute data, according to the Query shown below.<o:p></o:p>
The RM-project is part of a global configuration with three requirement components.
I have tried numerous variants of the query, but I always receive an empty response, see Response below
Furthermore, I receive attribute data when I sending a GET HttpRequest with the URI of the requirement.
I have read the examples in “https://jazz.net/library/article/635” and found the start-up information as follows:<o:p></o:p>
·       Catalog Entry:<o:p></o:p>
o   https://x1.x2.x3.x4/rm/oslc_rm/catalog/<o:p></o:p>
·       Service Provider:<o:p></o:p>
o   https:// x1.x2.x3.x4/rm/oslc_rm/_u9BacHJ7EeuYaNFaR904Vg/services.xml<o:p></o:p>
·       Query Capability:<o:p></o:p>
o   https://x1.x2.x3.x4/rm/views?oslc.query=true&projectURL=https%3A%2F% x1.x2.x3.x4%2Frm%2Fprocess%2Fproject-areas%2F_u9BacHJ7EeuYaNFaR904Vg
Can anyone advise me to be able to properly connect and query the RM-project?
Regards 
Magnus 
Headers:<o:p></o:p>
   OSLC-Core-Version: 2.0<o:p></o:p>
   Accept: application/rdf+xml
Query:<o:p></o:p>
https://x1.x2.x3.x4/rm/views?oslc.query=true&projectURL=https%3A%2F%2Fx1.x2.x3.x4%2Frm%2Fprocess%2Fproject-areas%2F_u9BacHJ7EeuYaNFaR904Vg&oslc.prefix=dcterms%3D%3Chttp%3A%2F%2Fpurl.org%2Fdc%2Fterms%2F%3Eoslc.select=dcterms%3Atitleoslc.where=dcterms%3Aidentifier%3D13289
Response: <o:p></o:p>
<?xml version="1.0"?>
-<rdf:RDF xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" <o:p></o:p>
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" <o:p></o:p>
xmlns:dcterms="http://purl.org/dc/terms/" <o:p></o:p>
xmlns:oslc_rm="http://open-services.net/ns/rm#" <o:p></o:p>
xmlns:oslc="http://open-services.net/ns/core#" <o:p></o:p>
xmlns:nav="http://jazz.net/ns/rm/navigation#" <o:p></o:p>
xmlns:jazz_rm="http://jazz.net/ns/rm#"><o:p></o:p>

-<oslc:ResponseInfo rdf:about="https://x1.x2.x3.x4/rm/views?oslc.query=true&projectURL=https%3A%2F%2Fx.x.x.sx%2Frm%2Fprocess%2Fproject-areas%2F_u9BacHJ7EeuYaNFaR904Vg&oslc.prefix=dcterms%3D%3Chttp%3A%2F%2Fpurl.org%2Fdc%2Fterms%2F%3Eoslc.select&dcterms%3Atitleoslc.where=dcterms%3Aidentifier%3D13289"><o:p></o:p>
 
<dcterms:title>Query Results</dcterms:title><o:p></o:p>
 
</oslc:ResponseInfo><o:p></o:p>
 
<rdf:Description rdf:about="https://x1.x2.x3.x4/rm/views?oslc.query=true&projectURL=https%3A%2F%2Fx1.x2.x3.x4%2Frm%2Fprocess%2Fproject-areas%2F_u9BacHJ7EeuYaNFaR904Vg"> </rdf:Description><o:p></o:p>
 
</rdf:RDF> 

Accepted answer

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Ian Barnard (1.9k●6●13) | answered Apr 06 '21, 5:51 a.m.
FORUM ADMINISTRATOR / FORUM MODERATOR / JAZZ DEVELOPER
edited Apr 07 '21, 9:32 a.m.

Hi


In your query URL the HTTP query string parameters aren't specified correctly. I think the reference for this is https://tools.ietf.org/html/rfc3986#section-3.4

You have:
Which split into URL (the bit before the ?) and query parameters (first parameter is at the ?, subsequent parameters all must start with &) is:

?oslc.query=true
&projectURL=https%3A%2F%2Fx1.x2.x3.x4%2Frm%2Fprocess%2Fproject-areas%2F_u9BacHJ7EeuYaNFaR904Vg
&oslc.prefix=dcterms%3D%3Chttp%3A%2F%2Fpurl.org%2Fdc%2Fterms%2F%3Eoslc.select=dcterms%3Atitleoslc.where=dcterms%3Aidentifier%3D13289

Removing the parameter value encoding this is:

You can see that the oslc.select and oslc.where parameters don't start with &

I'd expect this to look like:

?oslc.query=true
&oslc.prefix=dcterms=<http://purl.org/dc/terms/>
&oslc.select=dcterms:title
&oslc.where=dcterms:identifier=13289

When the parameter values are encoded these are:

?oslc.query=true
&projectURL=https%3A%2F%2Fx1.x2.x3.x4%2Frm%2Fprocess%2Fproject-areas%2F_u9BacHJ7EeuYaNFaR904Vg
&oslc.prefix=dcterms%3D%3Chttp%3A%2F%2Fpurl.org%2Fdc%2Fterms%2F%3E
&oslc.select=dcterms%3Atitle
&oslc.where=dcterms%3Aidentifier%3D13289

And reassembled into a URL the query URL should be:


ALSO you must provide the configuration URL using a header Configuration-Context on the GET, with the value of the config URL.

HTH
Ian

magnus Elfving selected this answer as the correct answer
Comments
magnus Elfving commented Apr 08 '21, 3:48 a.m.

Thanks Ian!


You are right,  I've got a  valid response from the server.

Regards 
Magnus
  

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