Are there any ISO or recommandation about available fields for estate agencies?
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I'm working on a generic crm application designed for estate agencies. We're working with several third party data and none of them are the same, it is a real mess.

No matter how we get the data, I'm wondering if there any standard defined to store and define  properties fields.

Note, that I'm working for a french provider (Seloger, LogicImmo, etc.), and I bet it may be different across Europe or countries.

For exemple I need to store the number of room, the price, place, and over 50 other properties depending on prestation (sale, rent, etc.).

Any feedbacks?