A document is any XML document with file extension type of xml, xslt, xsd, or tld . A document of file extension type xml is an Extensible Markup Language document. A document of file extension type xslt is an Extensible Stylesheet Language document. A document of type xsd is a W3C XML Schema document. A document of file extension type tld is a J2EE Tag Library Descriptor document.
A new document is created by selecting a document from a catalog of document types. The catalog has document templates for J2EE, J2SE, XSLT, W3C Schema, Apache Ant and Xhtml Schema documents. In XMLEspresso 6.0, a DTD document may also be created. New documents may be added to the catalog by editing catalogs.xml, which is stored under user's home directory/.xmle4j/config directory. When a document type is selected, a DTD or/and a W3C Schema is specified for the document. If no DTD or Schema is specified, a default Schema gets specified.
A new document can be edited in the Source mode or the Design mode. A new document is constructed by adding elements to the document. A choice list of elements in the Source mode and a node panel of elements in the Design mode provide a selection of sub-elements to add to an element. In the Source mode, a document may be validated using an appropriate DTD or a W3C Schema.