I have a custom doc type(extends cm:content) for store a PDF Files with a attribute "ocr" of type d:content(for store ocr of pdf File). I can store this correctly, but when I doing a search Alfresco not returns results, this not search in d:content attributes?
Ah … Edit that last comment … I've just spotted that your post specifies another content property.
What is the query you are using?
I think it will probably require some changes to get a property that is not cm:content to index. For example the content needs to be trensformed to text before it can be indexed. AFIK that's not done out of the box.