Despite the need for an integrated view, current practices in museums and libraries do not make it possible for users to access common or related content. The absence of a common schema that fits all the different data produced by the various institutions results in each institution choosing to use the metadata schema it considers appropriate for the description of its collection. The use of different schemas, standards and models in the documentation tasks makes it difficult to exchange and use information from different information systems.
In order to manage efficient data transfer and migration between heterogeneous sources of cultural contents and to provide the possibility of integrated access at these contents, experts must work with interoperability at the syntactic level by using compatible data formats and communication protocols but also at the more complex semantics level so that the exchanged information is meaningfully and accurately perceived and interpreted by different information systems. To achieve semantic interoperability institutions must refer to a common conceptual model.