1# Concept-map references23- [IHMC CmapTools concept-map overview](https://cmap.ihmc.us/docs/concept-maps.php) — prior art for concepts, linking phrases, propositions, hierarchy, and cross-links.4- [ISO 704:2022](https://www.iso.org/standard/59176.html) — terminology principles relevant to concept clarity and definitions.5- [Graphviz DOT language](https://graphviz.org/documentation/) — supported graph renderer and layout reference.67There is no universally adopted concept-map interchange standard in diagram.zip. A dedicated concept-map data model and validator would be an integration opportunity.