First sorry for the long post.
I trying to be clear about it

I have two problems:

We created a custom Attribute and named it IM which is a boolean attribute. We saw that the name for the attribute was generated or encrypted, is there a way to identify this attribute without needing to actually see the generated ID?
This is how it was displayed for us:
<rt>false</rt>
We need to use it on the where clause or our select, is it possible? How can we identify it?
Example:
"&oslc.where="+ URLEncoder.encode("rt:IM=false", "UTF8");

Second:
We managed to query the requirements from RRC just fine but we are having some troubles trying to query using the dcterms:modified attribute, which is a Date field.
We followed an example on the OSLC documentation and it did not work. The query show no results.
This is the example from the website:
?oslc.where=dcterms:title="test case 1" and dcterms:modified>="2008-12-02T18:42:30"
We even tried a different example also from OSLC documentation which doesn't use the time only the date ("2011-11-10") and it also did not work.
It doesn't show us any error but my guess is that the date format is wrong somehow. When we use a different filed like dcterms:identifier or dcterms:title it works just fine.

We are using the sample code from the workshop, this is how we are doing it:
String oslcSearchByModifiedQuery = queryCapabilityURI
+ "&oslc.prefix="
+ URLEncoder.encode("dc=<http>","UTF8")+
"&oslc.select=" + URLEncoder.encode("dc:title", "UTF8") +
"," + URLEncoder.encode("dc:description", "UTF8") +
"," + URLEncoder.encode("dc:modified", "UTF8") +
"," + URLEncoder.encode("dc:identifier", "UTF8") +
"&oslc.where="+ URLEncoder.encode("dc:modified>\"2011-11-27\"", "UTF8");

Thanks,
Daniel Bryon