subject heading

Deductions

• subject heading has quality class ⇐ (existence is a class), (subject heading has quality existence)
• subject heading is for example collection ⇐ (collection is a subject heading), (is a is inverse of is for example)
• information science term is for example subject heading ⇐ (subject heading is a information science term), (is a is inverse of is for example)
• subject heading has quality existence ⇐ (subject heading is a information science term), (information science term has quality existence)
• authority file has part subject heading ⇐ (authority file is subclass of controlled vocabulary), (controlled vocabulary has part subject heading)