MetaCat Documentation# Contents: MetaCat Concepts Namespace File Dataset Parameter Categories Ownership Query MetaCat Client Installation General CLI command syntax Versions User Authentication Namespaces Parameter Categories Datasets Files Metadata Categories Query Named Queries MetaCat API Creating MetaCat Client Interface MetaCatClient Class Methods Reference Exceptions Asynchronous Queries MQL - Metadata Query Language Introduction File Queries Metadata Comparison Array or Dictionary Elements Access Ranges and Sets Date and Time Segmenting Query Results Query Results Ordering Dataset Queries Combining File and Dataset Metadata Filtering Named Queries MQL Syntax File queries Dataset queries Metadata expressions Regular Expressions Cheat Sheet Server Installation Download and set up Running MetaCat server as a Docker Container Configuring Namespace Restriction Configuring LDAP Authentication Configuring WLCG Token Authentication