Specify a URI path that matches a simple pattern, as per Android.OS.PatternMatcher with Android.OS.Pattern.SimpleGlob. Note that because '\' is used as an escape character when reading the string from XML (before it is parsed as a pattern), you will need to double-escape: for example a literal "*" would be written as "\\*" and a literal "\" would be written as "\\\\". This is basically the same as what you would need to write if constructing the string in Java code.

Must be a string value, using '\\;' to escape characters such as '\\n' or '\\uxxxx' for a unicode character.

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

[Android Documentation]