Using Jamroom search - what do these search rules mean?
Using Jamroom
The % is the % key on your keyboard.
The key:value refers to the database key, ie. profile_name, profile_active, audio_title etc.
These will not work in your site search form, at least I've not been able to get them to work. They are more for your ACP datastore browser search fields.
You can also use the % in search parameters in your jrCore_list functions.
Hope this helps!