noun
notation attribute
Technical computing term for an attribute that specifies a notation or format, such as in data representation or markup.
XMLでは、記法属性を使ってデータの形式を宣言できる。
In XML, you can declare the data format using a notation attribute.
Compound of 記法 (notation) and 属性 (attribute). A straightforward technical term with no known historical derivation issues.