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+# Object Data Model apXtrib
+
+3 kind of apXtrib 
+
+
+
+Any Object has:
+- a name
+- a list of keys to discriminate Object between themself
+
+Any key has:
+- a name
+- a
+
+
+Main constrainst to explain choice:
+
+- minimum of dependency of external tools as database management
+
+
+
+
+
+