I've seen a similar question asked before ...

https://jazz.net/forum/questions/83614/using-wildcard-in-rest-url-queries

... but there was no clear answer, so:

I'm trying to call the OSLC REST API to perform a full text search on work items, including substring matches. In the RTC client, searching for "abc*" returns matches for "abcd" and "abcde". However, appending the asterisk to the oslc_cm:searchTerms parameter returns no matches. There is obviously support for wildcards on some level because I can pass in "abc?" which matches "abcd", or "abc??", which matches "abcde", but I haven't figured out a way to specify an arbitrary number of characters. Is there one?