Keys are unique, distinctive descriptions for meanings, data points and facilities that help QBRX to find and assign them. In case of meanings, and therefore data points, keys are already set and can't be changed. However, if you want to create a new facility, you can choose a fitting key yourself. Keys are used to address facilities and data points in QRLs. If you would like to more about QRLs and their structure, take a look at this article. Examples for Keys:
| Facility | Key | QRL Example |
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| Hörburger AG (organization) | hoerburger | Absolute | fac:/hoerburger | | Niederlassung Erfurt | (site) | niederlassung_erfurt | Absolute | fac:/hoerburger/niederlassung_erfurt | | Relative | fac:../niederlassung_erfurt | | Zähler Serverraum | (electricity meter) | zaehler_serverraum | | Absolute | fac:/hoerburger/niederlassung_erfurt/zaehler_serverraum | | Relative | fac:zaehler_serverraum | | DatenpunktData point | Key |
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| Load profile electricity | electricity_load_profile | Absolute | dp:/hoerburger/niederlassung_erfurt:electricity_load_profile | | Relative | dp:.../niederlassung_erfurt:electricity_load_profile |
Rules for the naming of keys:- keys consist of lower case letters
- words can be separated by underscores
- special characters or umlauts are forbidden
- Facility keys should be named according to their facility
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