> For the complete documentation index, see [llms.txt](https://developer.siteminder.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.siteminder.com/channels-plus-api/additional-resources/reference-tables.md).

# Reference Tables

- [Document Type Code (DOC)](https://developer.siteminder.com/channels-plus-api/additional-resources/reference-tables/document-type-code-doc.md): Lists codes identifying document types used in transactions.
- [Error Codes (ERR)](https://developer.siteminder.com/channels-plus-api/additional-resources/reference-tables/error-codes.md): Contains codes for specific errors encountered within the API.
- [Error Warning Types (EWT)](https://developer.siteminder.com/channels-plus-api/additional-resources/reference-tables/error-warning-types.md): Defines types of warnings that accompany specific errors.
- [Fee Tax Type (FTT)](https://developer.siteminder.com/channels-plus-api/additional-resources/reference-tables/fee-tax-type.md): Includes codes for tax and fee types applied to charges.
- [HTTP Error Handling](https://developer.siteminder.com/channels-plus-api/additional-resources/reference-tables/http-error-handling.md): Guidelines for interpreting and handling HTTP 4xx and 5xx responses.
- [Meal Plan Type (MPT)](https://developer.siteminder.com/channels-plus-api/additional-resources/reference-tables/meal-plan-type.md): Lists codes for different meal plans available for bookings.
- [OpenTravel Codes List](https://developer.siteminder.com/channels-plus-api/additional-resources/reference-tables/opentravel-codes-list.md)
- [Payment Card Provider Codes](https://developer.siteminder.com/channels-plus-api/additional-resources/reference-tables/payment-card-provider-codes.md): Identifies codes for various payment card providers.
- [Service and Extra Charge](https://developer.siteminder.com/channels-plus-api/additional-resources/reference-tables/service-and-extra-charge.md): Contains ServiceInventoryCode for additional services or charges.
- [Strong Customer Authentication Codes](https://developer.siteminder.com/channels-plus-api/additional-resources/reference-tables/strong-customer-authentication-codes.md): Lists codes for authentication types required for secure transactions.
- [Test Credit Cards](https://developer.siteminder.com/channels-plus-api/additional-resources/reference-tables/test-credit-cards.md): Mock data for simulating payment transactions during reservation testing.


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