The notation you want for abbreviating the URIs of properties is not QName but CURIE.
Syntactically they are similar but not identical; every QName is syntactically a valid CURIE but the reverse is not the case.
A QName is a shorthand for a (namespaced) XML element or attribute name. It's actually not an abbreviation for a URI; it's an abbreviation for a pair: a URI and a "local" XML name. This means that the part of a QName after the colon must be a valid XML name, which means that it can't for instance start with a digit. This makes isbn:0321154991 not a valid QName, though it would be a valid CURIE.
A CURIE by contrast is a shorthand for a URI, and that's exactly what you need for RDF properties and classes.
The notation you want for abbreviating the URIs of properties is not QName but CURIE.
Syntactically they are similar but not identical; every QName is syntactically a valid CURIE but the reverse is not the case.
A QName is a shorthand for a (namespaced) XML element or attribute name. It's actually not an abbreviation for a URI; it's an abbreviation for a pair: a URI and a "local" XML
name. This means that the part of a QName after the colon must be a valid XML name, which means that it can't for instance start with a digit. This makesisbn:0321154991not a valid QName, though it would be a valid CURIE.A CURIE by contrast is a shorthand for a URI, and that's exactly what you need for RDF properties and classes.