and in the case of values other than "1.2", the elements do not comprise an OpenDocument 1.2 document. Conformance ODF 1.0/1.1 The OpenDocument specification does not specify which elements and attributes conforming applications must, should, or may support. Even typical office applications may only support a subset of the elements and attributes defined in the specification. The specification contains a non-normative table that provides an overview which element and attributes usually are supported by typical office application. Documents that conform to the OpenDocument specification may contain elements and attributes not specified within the OpenDocument schema. Such elements and attributes must not be part of a namespace that is defined within the specification and are called foreign elements and attributes. Conforming applications either shall read documents that are valid against the OpenDocument schema if all foreign elements and attributes are removed before validation takes place, or shall write documents that are valid against the OpenDocument schema if all foreign elements and attributes are removed before validation takes place. Conforming applications that read and write documents may preserve foreign elements and attributes. In addition to this, conforming applications should preserve meta information and the content of styles. Conforming applications shall read documents containing processing instructions and should preserve them. ODF 1.2 ODF 1.2 defines precisely the conformance needs. The specification defines conformance for documents, consumers, and producers, with two conformance classes called conforming and extended conforming. It further defines conforming text, spreadsheet, drawing, presentation, chart, image, formula and database front end documents. Chapter 2 defines the basic requirements for the individual conformance targets. Footnotes References OpenDocument 1.3 specification in ODT, HTML and PDF formats OpenDocument 1.2 specification in ODT, HTML and PDF formats OpenDocument 1.1 specification in ODT, HTML and PDF formats OpenDocument 1.0 specification in PDF format External links Discussion of a Linux shell script to reduce OpenDocument file sizes Application Media Types IANA. Open Document Format (ISO/IEC 26300) / Office Open XML (ISO/IEC 29500) Translation Guidelines - ISO/IEC PDTR 29166 OpenDocument Technical specifications