IVOA Recommendation: IVOA Identifiers Version 1.12

IVOA Recommendation: IVOA Registry Interfaces Version 1.0

IVOA Recommendation: IVOA Single-Sign-On Profile: Authentication Mechanisms Version 1.01

IVOA Recommendation: IVOA Support Interfaces

IVOA Recommendation: Maintenance of the list of UCD words Version 1.20

IVOA Recommendation: Observation Data Model Core Components and its Implementation in the Table Access Protocol Version 1.0

IVOA Recommendation: Resource Metadata for the Virtual Observatory Version 1.12

IVOA Recommendation: SAMP - Simple Application Messaging Protocol Version 1.3

IVOA Recommendation: Simple Cone Search Version 1.03

IVOA Recommendation: Simple Image Access Specification Version 1.0

IVOA Recommendation: Simple Line Access Protocol Version 1.0

IVOA Recommendation: Simple Spectral Access Protocol Version 1.1

IVOA Recommendation: Simple Spectral Lines Data Model Version 1.0

IVOA Recommendation: Sky Event Reporting Metadata Version 2.0

IVOA Recommendation: Space-Time Coordinate Metadata for the Virtual Observatory Version 1.33

IVOA Recommendation: Spectrum Data Model 1.1

IVOA Recommendation: Table Access Protocol Version 1.0

IVOA Recommendation: The UCD1+ controlled vocabulary Version 1.23

IVOA Recommendation: Universal Worker Service Pattern Version 1.0

IVOA Recommendation: Vocabularies in the Virtual Observatory Version 1.19