.. toctree::
    :depth: 3

    reference/introduction
    reference/architecture
    reference/configuration
    reference/data-retrieval-and-manipulation
    reference/query-builder
    reference/transactions
    reference/platforms
    reference/types
    reference/schema-manager
    reference/schema-representation
    reference/events
    reference/security
    reference/sharding
    reference/sharding_azure_tutorial
    reference/supporting-other-databases
    reference/portability
    reference/caching
    reference/known-vendor-issues
    reference/upgrading