The document discusses principles of open data sharing and legal interoperability of research data. It provides summaries of the GEO Data Sharing Principles from 2005 and a proposed updated version from 2015. The principles advocate sharing data as open data by default without charge or reuse restrictions. Exceptions can be made for reasons of national security, endangered species protection, or other restrictions allowed by law. The document also summarizes proposed principles from RDA/CODATA on facilitating lawful access to research data while balancing various legal interests through transparent communication of rights.