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How to get the category list from the project area using OSLC or Rest API ?

2 answers

Hi Vinitha, Retrieving list of categories for a given project via OSLC has some answers you could use.
Best Regards
Sunil

A too late answer but if that can help.
You can do a call like this one with RET API :
https://<YourServerAddress>:<YourServerPport>/ccm/rpt/repository/workitem?fields=workitem/category[projectArea/name='<Your project area Name>']/*