2.1    Document Roots

A document root element is the primary element of a document in OpenDocument format. It contains the entire document. All types of documents, for example, text documents, spreadsheets, and drawing documents use the same types of document root elements.

The OpenDocument format supports the following two ways of document representation:

�        As a single XML document.

�        As a collection of several subdocuments within a package (see section 17), each of which stores part of the complete document. Each subdocument has a different document root and stores a particular aspect of the XML document. For example, one subdocument contains the style information and another subdocument contains the content of the document. All types of documents, for example, text and spreadsheet documents, use the same document and subdocuments definitions.

There are four types of subdocuments, each with different root elements. Additionally, the single XML document has its own root element, for a total of five different supported root elements. The root elements are summarized in the following table:

The definitions of the root elements described in the table above are analogous to the definition of <office:document>, except that the child element specification is suitably restricted.