XML eXtensible Markup Language message with keyboard and optical mouse on wooden background

element, tag, child, style, stream, structure, text, document, template, hierarchy, parent, node, language, processor, value, attribute, declaration, validate, root, content, definition, nesting, reference, encoding, sibling, comment, transform, version, schema, extensible, syntax, xml, markup, entity, decode, encode, uri, prefix, metadata, parsing, parser, namespace, dtd, serialize, prolog, cdata, xslt, xquery, xpath, deserialize,