Open Packaging Conventions

Open Packaging Conventions (OPC)
AbbreviationOPC
Native name
Office Open XML File Formats - Open Packaging Conventions
StatusPublished
First publishedDecember 7, 2006 (2006-12-07)
Latest versionISO/IEC 29500-2:2021
August 2021 (2021-08)
OrganizationMicrosoft, Ecma, ISO/IEC
Base standardsECMA-376, ISO/IEC 29500-2
Related standardsXML, ZIP
DomainElectronic documents
WebsiteECMA-376,
ISO/IEC 29500-2:2021

The Open Packaging Conventions (OPC) is a container-file technology initially created by Microsoft to store a combination of XML and non-XML files that together form a single entity such as an Open XML Paper Specification (OpenXPS) document. OPC-based file formats combine the advantages of leaving the independent file entities embedded in the document intact and resulting in much smaller files compared to normal use of XML.[dubiousdiscuss]