| Subject | English | Welsh |
| comp., MS | Excel XML Format | Fformat XML Excel (The formal name for Excel 12 file format. The Excel XML Format has an open, royalty-free specification, and is the technology licensed to external parties) |
| comp., MS | External Application XML | XML Rhaglen Allanol (XML that provides information about an external application and about the Web Part that hosts it) |
| comp., MS | rich text XML mapping | mapio XML tesun cyfoethog (A type of XML mapping that links WordprocessingML content directly to the backing data in the custom XML part) |
| comp., MS | Word XML Format | Fformat XML Word (The formal name for Word 12 file format. This format has an open, royalty-free specification, and is the technology licensed to external parties. This license is the subject in the messaging points where "Open, royalty-free license" is discussed) |
| comp., MS | XML attribute | priodwedd XML (A name-value pair, separated by an equal sign and included in a tagged element, that modifies features of an element. All XML attribute values are strings enclosed in quotation marks) |
| comp., MS | XML element | elfen XML (An XML structure that consists of a start tag, an end tag, and the information between the tags. Elements can have attributes and can contain other elements) |
| comp., MS | XML expansion pack | pecyn estyniad XML (A collection of files, managed by a manifest.xml file, that add functionality to a Microsoft Office Word or Microsoft Office Excel document by specifying custom display or actions) |
| comp., MS | XML feed | crynodeb XML (A distribution mechanism for frequently-updated content that is aggregated by an RSS reader and delivered or published in a standard XML format. The content is often summarized, with links to a more complete version) |
| comp., MS | XML Path Language | Iaith Llwybr XML (A language used to address parts of an XML document. XPath also provides basic facilities for manipulation of strings, numbers, and Boolean values) |
| comp., MS | XML schema | sgema XML (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)) |