Contracts for Data Collaboration (C4DC) seeks to strengthen trust, transparency, and accountability of cross-sector data collaboratives. The intent of this initiative is to enable more effective and efficient ways of accessing, sharing and using data for public problem-solving and sustainable development. Central to C4DC is the objective of demystifying the complexity of data sharing agreements. Establishing the legal provisions for a data collaborative can be time-consuming and complex. By providing both an analytical framework and an online library of legal clauses which capture the key elements involved in a data collaboration, the transaction costs and misunderstandings that often occur during the negotiating of a data collaborative can be reduced.