UNI CEI ISO/IEC 29500-2:2013

This Part of ISO/IEC 29500 specifies a set of conventions that are used by Office Open XML documents to define the structure and functionality of a package in terms of a package model and a physical model. The package model is a package abstraction that holds a collection of parts. The parts are composed, processed, and persisted according to a set of rules. Parts can have relationships to other parts or external resources, and the package as a whole can have relationships to parts it contains or to external resources. The package model specifies how the parts of a package are named and related. Parts have content types and are uniquely identified using the well-defined naming rules provided in this Part of ISO/IEC 29500. The physical mapping defines the mapping of the components of the package model to the features of a specific physical format, namely a ZIP archive. This Part of ISO/IEC 29500 also describes certain features that might be supported in a package, including core properties for package metadata, a thumbnail for graphical representation of a package, and digital signatures of package contents. Because this Part of ISO/IEC 29500 might evolve, packages are designed to accommodate extensions and to support compatibility goals in a limited way. The versioning and extensibility mechanisms described in Part 3 support compatibility between software systems based on different versions of this Part of ISO/IEC 29500 while allowing package creators to make use of new or proprietary features. This Part of ISO/IEC 29500 specifies requirements for documents, producers, and consumers. Conformance requirements are identified throughout the text of this Part of ISO/IEC 29500. A formal conformance statement is given in §2. An informative summary of requirements relevant to particular classes of developers is given in Annex H. This third edition cancels and replaces the second edition (ISO/IEC 29500-2:2011), which has been technically revised by incorporation of the Technical Corrigendum ISO/IEC 29500-2:2011/Cor.1:2012.