Taxonomies are the structured meta-data systems that can be used to “code” or “tag” almost any aspect of an evaluation framework or program structure. Such coding makes it possible to create categorizations in and relationships between the different entities and can support “apples-to-apples” comparisons and learning. Philanthropy.io works to develop a taxonomy which reflects the Foundation’s grantmaking goals and strategy and is in line with the Foundation’s actual program work. In doing so, we borrow from, adapt, and expand existing taxonomies such as the Foundation Center’s Philanthropy Classification System, the United Nations Sustainable Development Goals, and any other well-adopted taxonomies related to the Foundation’s programs. We strive to create a structure which reflects the unique approach of the Foundation and is compatible with other coding systems. This helps facilitate an internally-focused evaluation as well as an “apples-to-apples” comparison with the rest of the Philanthropic sector.