xMatch additional resources

Algorithms, API and news for the CDS xMatch catalogue cross-matching service.

xMatch algorithms

Documentation on the algorithms and parameters used for the CDS xMatch catalogue cross-matching service.
xMatch HTTP API

Documentation on the HTTP API for the CDS xMatch catalogue cross-matching service, with Python, Ruby and Java code examples.
xMatch modifications

Evolution of the CDS xMatch catalogue cross-matching service, and list of new very large catalogue tables being added.