A measurable physical or abstract property of an entity. [ ISO/IEC 12207, ISO/IEC 14598 ]
Attribute [ IEEE 610.12 ]: A characteristic of an item; for example, the item's color, size, or type.
Attribute [ ISO/IEC 15939, ISO/IEC 25000 ]: Inherent property or characteristic of an entity that can be distinguished quantitatively or qualitatively by human or automated means.
Attribute for Quality Measure [ ISO/IEC 25000 ]: Attribute that relates to software product itself, to the use of the software product or to its development process.