What is the role of metadata in data modeling?

Metadata in data modeling provides essential information about the data's structure, organization, and context. Its roles include:

1. **Data Definition:** Describes the attributes, relationships, and constraints of data elements.

2. **Data Management:** Assists in organizing and managing data efficiently by providing details on data sources and definitions.

3. **Data Integration:** Facilitates integration and interoperability between different data systems by providing context and definitions.

4. **Data Governance:** Supports data quality and governance by documenting data rules, standards, and lineage.

Metadata enhances understanding, management, and use of data within a data model.