A conceptual description of data objects, their attributes and the relationship between them is
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A Data Warehouse
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A Data Model
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An InfoCatalog
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An infoset
A Data Model provides a conceptual description of data objects, their attributes, and the relationships between them. It's an abstract representation that defines the structure and organization of data independent of any physical implementation. A Data Warehouse is a physical storage system. An InfoCatalog is metadata about available data. An InfoSet is a specific view or dataset definition, not the conceptual model itself.
A Data Model is, by definition, a conceptual representation of the data objects (entities), their attributes, and the relationships between them — it describes the structure of information independent of how it's physically stored. A Data Warehouse is the storage system itself, an InfoCatalog is a metadata repository, and an InfoSet is a reporting-level view — none of these describe the conceptual entity-attribute-relationship abstraction that defines a data model.