LibGuides: Library Quality Standards (MRSU): Library of Congress Standards

Resource Description Formats

BIBFRAME (Bibliographic Framework Initiative)
Linked data model, vocabulary, and tools for expressing bibliographic data
EAD (Encoded Archival Description)
XML markup designed for encoding archival finding aids
Extended Date/Time Format (EDTF)
Comprehensive date/time definition for the bibliographic community
MADS (Metadata Authority Description Standard)
XML markup for authority data from MARC 21 records and original authority data
MARC 21 formats
Representation and communication of descriptive metadata about library items
MARCXML
XML representation of MARC 21 data
MODS (Metadata Object Description Standard)
XML markup for metadata from existing MARC 21 records and original resource description
VRA Core
XML schema and data format description of visual culture and images that document them

ALTO
Technical metadata for Optical Character Recognition (OCR)
AudioMD and VideoMD
XML schemas for technical metadata on audio- and video-based digital objects
METS (Metadata Encoding & Transmission Standard)
Structure for encoding descriptive, administrative, and structural metadata
MIX (NISO Metadata for Images in XML)
XML schema for encoding technical data elements required to manage digital image collections
PREMIS (Preservation Metadata)
Data dictionary and supporting XML schemas for core preservation metadata needed to support the long-term preservation of digital materials.
TextMD (Technical Metadata for Text)
XML schema that details technical metadata for text-based digital objects

CQL (Contextual Query Language)
Formal, user-friendly query language for use between information retrieval systems
SRU/SRW (Search and Retrieve URL/Web Service)
Web services for search and retrieval based on Z39.50 semantics
Z39.50
Supports information retrieval among different information systems

ISO 20775 Schema for holdings information
ISO 639-2 Codes for representing names of languages (Part 2: Alpha-3 code)
ISO 639-5 Codes for representing names of languages (Part 5: Alpha-3 code for language families and groups)
ISO/DIS 25577 Information and documentation (MarcXchange)