The Federated Metadata Management Engine is a schema-agnostic metadata management engine. FeMME is designed to provide storage and query capabilities over a wide range of metadata formats from multiple data sources. FeMME lies on top of a NoSQL document database (MongoDB), thus allowing it to have a dynamic model. The use of such a database offers the ability of metadata indexing in order to minimize query times.

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The key features of the engine include:

• Support of multiple metadata formats
• Dynamic model
• Querying performance
• Schema agnostic