Properties can offer the following meal plans: breakfast, lunch and dinner. This is shown under the <room> part of the XML message.
Within that, you can see the type of breakfast the guest booked, which appears under <type>.
Here you’ll find an example of a booking where the breakfast costs 4 (euros, for example) per person, per night. And the type is 1 (which the property can configure as English, continental, or whatever they offer).
If you need more details about meal plans, check out the following links:
For OTA, click here.
For B_XML, click here.