TEIMETA is a tool for editing XML files. The editing structure, possibilies, and information are described in an XML ODD TEI file. TEIMETA uses this description (the model) to produce automatically a user interface in a webbrowser or an independant Electron application. Integration of the tool in another application is possible through two different method: 1) integrate the library as a plugin in another website, using your own functions to load and save the data 2) redesign the HTML interface using the full power of the tool. The tool was created to edit TEI files, but it can be used for any type of XML format. XML schema control of the XML created files is not (yet) implemented. The quality of the final files is automatically controled by the description (the ODD model) but the quality of what the model generates is not controlled by TEIMETA (note that it would be very difficult to control that the ODD are garantied to allways build correct XML files). TEIMETA allows to edit any XML node but not to move this node around in the XML file. New nodes can be created and nodes can be erased (if this is allowed by the model). The ODD describes node position from the root. **The values of an XML node not described in the ODD file will never be modified. This means that it is possible to edit parts of an XML file respecting the integrity of the rest of the file.