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

# EDF

This page provides a high-level summary of EDF notifications for hotel inventory, rates, and allotment.

## Introduction

EDF (Einheitliches Daten Format) is a component-based XML format for exchanging travel product data between tour operators and distributors. It ensures accuracy, detail, and speed in delivering travel offers.

EDF supports two main notification types:

* **EDF\_HOTEL**: Delivers inventory and rates information.
* **EDF\_ALLOTMENT**: Delivers daily allotment (availability) information.

EDF also supports detailed product attributes using DRV GlobalTypes for uniform descriptions.

## Product Identification

Each notification includes a header with key product identifiers:

* Hotel Code
* FileKey and FileKeyCombination (for seasonal transitions).
* ProgramType (optional, for booking requirements).
* Source (origin of the product, optional).
* TourOperatorCode (mandatory for bookings).

<Note>
  Source and TourOperatorCode should be mapped on the client side.
</Note>

## Packaging

EDF supports both pre-packaged and dynamic package models:

* Pre-packaged: Combines multiple services (e.g., hotel + car rental) into a single offer.
* Dynamic: Allows flexible combinations at booking time.

Car packages use inventory block codes and follow the ACRISS standard.

## Allotment

Allotment files define room availability and distribution strategy:

* **Strategy**: Can be by “Arrival” or “Stay” (default is Stay).
* **Pattern**: Indicates daily availability using codes (0-9, \*, R, S).
  * `*`: More than 9 rooms available (free sale)
  * `0`: Not available
  * `R`: On request
  * `S`: Stop sale

<Note>
  Check official documentation for the full list of pattern codes and usage.
</Note>

* **PatternLength**: Controls the length of the pattern string.
* **Delta**: Indicates if the file is a full stock delivery (`Delta="false"`) or a delta update (`Delta="true"`).

<Warning>
  A full stock delivery must be performed once per day before sending delta updates. Delta files only update the specified dates, rooms, or boards.
</Warning>

Hotels can be deactivated by sending an allotment update with all days set to stop sale.

## Inventory and Rates

EDF Hotel files contain two main blocks: Basic Data and Selling Data.

### Basic Data

Includes:

* Hotel name, chain, codes (Giata, IFF), address, geolocation
* Arrival/departure airports, transfer info, hotel attributes, reviews

### Selling Data

Includes:

* Season labels and definitions
* Currency (ISO 4217 code)
* Rounding rules for prices
* Extras (offers, incentives, charges, included services)
* Restrictions (stop sales, min/max stays, fixed arrival days, etc.)
* Rooms (descriptions, occupancies, possible boards, prices)
* Boards (board types, global codes for unified search)
* ChargeBlocks (price calculation, board/guest charges, reductions)

<Note>
  Check official documentation for XML structure, attribute details, and code examples.
</Note>

### Key Concepts

* **ChildrenAgeOrder**: Controls how child discounts are applied (ascending/descending by age).
* **Occupancies**: Defines min/max guests, adults, children, infants per room.
* **ChargeBlocks**: Assign prices by season, board, guest type, and apply reductions or supplements.

<Tip>
  Use consistent currency codes and season definitions for accurate pricing and mapping.
</Tip>

***

For technical details, XML samples, and attribute definitions, please refer to the official documentation.