add specifications

README.md

@@ -25,3 +25,15 @@
 | NeXus-FAIRmat                            |                                | [:bookmark_tabs:](https://fairmat-nfdi.github.io/nexus_definitions/index.html)       | FAIRmat extension, characterization |
 | Crystallographic Information File (CIF)  |                                | [:bookmark_tabs:](https://www.iucr.org/resources/cif/spec/version1.1)                | crystallography                     |
 | Crystallographic Information File (CIF2) |                                | [:bookmark_tabs:](https://www.iucr.org/resources/cif/cif2)                           | crystallography                     |
+
+## Specifications
+
+|                            **Name**                            |                              **Repository**                              |                             **Documentation**                             |                   **Keywords**                   |
+|:--------------------------------------------------------------:|:------------------------------------------------------------------------:|:-------------------------------------------------------------------------:|:------------------------------------------------:|
+| The Open Databases Integration for Materials Design - OPTIMADE | [:file_folder:](https://github.com/Materials-Consortia/OPTIMADE)                          | [:bookmark_tabs:](https://www.optimade.org/)                                                 | materials design, simulation                     |
+| Standardised documentation of Simulations (MODA)               |                                                                          | [:bookmark_tabs:](https://emmc.eu/moda/)                                                     | modelling workflows                              |
+| MatML                                                          |                                                                          | [:bookmark_tabs:](http://docs.oasis-open.org/materials/materials-matml-spec-pr-01.htm)       |  heat treatment, mechanical properties,chemistry |
+| ColabFit Standard                                              |                                                                          | [:bookmark_tabs:](https://colabfit.org/data-standard/)                                       | atomistic simulations, ML                        |
+| Electronic Structure Common Data Format (ESCDF)                | [:file_folder:](https://gitlab.com/ElectronicStructureLibrary/escdf/escdf-specifications) |                                                                           | electronic structure                             |
+| Graphical Expression of Materials Data (GEMD)                  |                                                                          | [:bookmark_tabs:](https://citrineinformatics.github.io/gemd-docs/)                           | materials, processes, characterization           |
+| NOMAD Metainfo                                                 |                                                                          | [:bookmark_tabs:](https://nomad-lab.eu/prod/v1/staging/docs/howto/customization/basics.html) | NOMAD, YAML                                      |