XBRL-based structured digital financial reporting - Blog: Digital Financial Reporting (using XBRL)

Shawn Riley posted excellent information that describes the four levels of interoperability. Here are those four levels:

Foundational (Level 1): Establishes the inter-connectivity requirements needed for one system or application to securely communicate data to and receive data from another.
Structural (Level 2): Defines the format, syntax and organization of data exchange including at the data field level for interpretation.
Semantic (Level 3): Provides for common underlying models and codification of the data including the use of data elements with standardized definitions from publicly available value sets and coding vocabularies, providing shared understanding and meaning to the user.
Organizational (Level 4): Includes governance, policy, social, legal and organizational considerations to facilitate the secure, seamless and timely communication and use of data both within and between organizations, entities and individuals. These components enable shared consent, trust and integrated end-user processes and workflows.

Here are more details related to interoperability (i.e. effective information exchanges).

The above interoperability model is consistent with an interoperability model used in health care.