LEAP2A is a specification for portfolio interoperability that is relatively simple, developer-friendly, and based on a relational model rather than a hierarchical one like other specifications. It was developed with input from developers and practitioners and has been implemented with ease through the PIOP project. LEAP2A defines basic elements of portfolio information as "blobs" in a semantic web of relationships, and uses the Atom format to represent these in a way that is modular, extensible, and compatible with the semantic web and future developments.