noun
attribute specification
Computing term for specifying or designating attributes, such as in markup, programming, or configuration.
HTMLでは、属性指定によって要素の振る舞いを変えられます。
In HTML, you can change the behavior of elements through attribute specification.
この設定ファイルでは、属性指定の書式が厳密に決められています。
In this configuration file, the format for attribute specification is strictly defined.
属性 (attribute) is the general noun; 属性指定 is the act or process of specifying attributes, often used in technical contexts.
Compound of 属性 (attribute) and 指定 (specification). A straightforward technical term with no known historical irregularities.