Apache Iceberg ↗ is an open-source table format. A table format is a specification for how a collection of data files in storage is organized so that many different tools can read and write those files as one table, with a defined set of columns and a history of changes. Reading an Iceberg table typically also uses an Iceberg catalog, which records which tables exist and where each table's files are currently stored, so that a tool can find a table without tracking its individual files.
In Foundry, Iceberg tables are an alternative resource type to a Foundry dataset for representing tabular data. Foundry offers Iceberg both as managed tables via Foundry's Iceberg catalog and as virtual tables via an external catalog such as AWS Glue, Snowflake Horizon Catalog, Apache Polaris, or Databricks Unity Catalog. Refer to the Iceberg tables section of the documentation for more details on Foundry Iceberg tables.