---
title: "Reference"
slug: "dev-catalog-reference"
updated: 2026-10-28T02:15:22Z
published: 2026-10-28T02:15:22Z
canonical: "docs.vastdata.com/dev-catalog-reference"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.vastdata.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Reference

The columns and types of both tables. Use Catalog schema for the Catalog and Audit log schema for the audit log.

- **[Catalog schema](/develop/docs/dev-catalog-reference-schema)**: The 33 columns of vast_big_catalog_table with their Arrow types, plus user-defined columns and the table names.
- **[Audit log schema](/develop/docs/dev-catalog-reference-audit-log-schema)**: Every column of vast_audit_log_table with its type, for all protocols and for S3, NFS and SMB, plus the operation types.