DC: Dublin Core Metadata Initiative

METS: Metadata Encoding and Transmission Standard

MODS: Metadata Object Description Schema

EAD: Encoded Archival Description

TEI: Text Encoding Initiative

IFLA: Metadata Resources for Digital Libraries

CIMI: Computer Interchange of Museum Information

MCF: Meta Content Framework

MPEG-21

MPEG-7

IMS: Instructional Management Systems

GEM: The Gateway to Educational Materials

EdNA: Education Network Australia

GILS: US Governmment Information Locator Service

CSDGM: Content Standard for Digital Geospatial Metadata

W3C Metadata activity

W3C Semantic Web activity