"Application reference": an application uses another one
"Owned": a container owns a node, an application owns source files
"Owner": a file is contained by a container, an application is an owner of a source file
Object
"Define <object kind>": a source file defines or declares an object
"Using global <object kind> object": a source file uses an object in global scope, it is a default value when no link type is applied
"Using <object kind> object": a source file uses an object, it is a default value when no link type is applied
"Resolved Symbol", "[Dynamic] <link type>" and the "GDG …" tokens are qualifiers appended to a link type with "; " (for instance "PDS use; Resolved Symbol", "Call; [Dynamic] Call"). Several statements resolving to the same target are merged into one link whose type lists every contributing type, sorted ("Comment query; Define [SQL]TABLE").
"Linked scope": a source file uses a scope like importing a package in Java