| Subject | English | Italian |
| IT | XML Schema Definition | XSD |
| IT, engl. | XML Schema Definition | XML Schema Definition |
| comp., MS | XML schema definition language | XML Schema Definition Language (The World Wide Web Consortium (W3C) standard language used for creating XML schema documents. The XML schema contains two parts: a set of predefined types (for example, string, dateTime, decimal), and an XML language for defining new types (for example, complexType, minOccurs, element)) |