If you want find out that a property exists in JCR, then use the query debug tool with the following query
type=nt:unstructured
path=/content/bt/business
property=formname
property.operation=exists
p.hits=full
p.limit=-1
type- Node type that you want to perform your search on.path- Path you want to perform the search.property- The property that you want to test if it exits.property.operation- The operation you want to perform for the test. The available operations areequals,unequals,like,not,exists.p.hits- Provides all the properties of the matched nodes.p.limit- Limit your results.