> For the complete documentation index, see [llms.txt](https://docs.materialsproject.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.materialsproject.org/apps/explorer-apps/mof-explorer/property-definitions.md).

# Property Definitions

- [SMILES, MOFid, and MOFkey](https://docs.materialsproject.org/apps/explorer-apps/mof-explorer/property-definitions/smiles-mofid-and-mofkey.md): What are SMILES strings, a MOFid, and a MOFkey?
- [Pore Geometry](https://docs.materialsproject.org/apps/explorer-apps/mof-explorer/property-definitions/pore-geometry.md): How were pore-based properties computed?
- [Topology](https://docs.materialsproject.org/apps/explorer-apps/mof-explorer/property-definitions/topology.md): What is a MOF topology, and how was it determined?
- [Electronic Structure](https://docs.materialsproject.org/apps/explorer-apps/mof-explorer/property-definitions/electronic-structure.md): How were electronic structure properties computed?
- [Population Analyses and Bond Orders](https://docs.materialsproject.org/apps/explorer-apps/mof-explorer/property-definitions/population-analyses-and-bond-orders.md): How were partial atomic charges, atomic spin densities, and effective bond orders computed?
- [Symmetry](https://docs.materialsproject.org/apps/explorer-apps/mof-explorer/property-definitions/symmetry.md): How is the symmetry determined?