obsolete element
Technical term for a component, feature, or specification that is no longer current or supported. Often used in engineering, computing, or standards contexts.
In this standard, there are several features treated as obsolete elements.
noun-modifying (irregular)
obsolescent
Prenominal use describing something that is becoming obsolete or is in the process of being phased out. Less common than the noun form.
Obsolescent technologies are not supported in the new system.
Compound of 廃 (hai, 'obsolete, disused') and 要素 (yōso, 'element, component'). A modern technical coinage, likely from engineering or computing terminology.