DNG OSLC API to get all artifacts in a folder
One answer
Using OSLC Query for requirements you can get all core artifacts in a folder using e.g. oslc.where=rm_nav:parent=<FOLDERURI> - note the < and > must be there as per the OSLC Query oslc.where syntax, and the query parameter value after the first = url-encoded as per standard http). You'll also need to specify the rm_nav prefix in the oslc.prefix value.
The oslc.where parameter is: oslc.where=rm_nav%3Aparent%3D%3Chttps%3A//jazz.ibm.com%3A9443/rm/folders/FR_WfhiPnaKEfCeB7Wej8YFgg%3E
which url-decoded is: oslc.where=rm_nav:parent=<https://jazz.ibm.com:9443/rm/folders/FR_WfhiPnaKEfCeB7Wej8YFgg>
There's an OSLC Query Capability for folders which you can use to find the URI of a folder. Don't give it an oslc.where or oslc.select. The folder query capability first gives you (using the QueryBase url) the subfolders contained in the root folder, using the nav:subfolders URLS in these results you have to iterate through+into these with further queries checking for the folder name you want.
HTH
Ian