To reduce the need to design and maintain your own file format for measurement data, National Instruments defines the flexible technical data management (TDM) data model, which is accessible through LabVIEW, LabWindows™/CVI™, Measurement Studio, SignalExpress, and DIAdem. The TDM data model also enables you to write well-organized data regardless of which third-party products you are using.
The TDM data model supports the following two file formats:
|Note When creating or opening a .tdms file, LabVIEW might automatically create a .tdms_index file. LabVIEW uses the .tdms_index file to speed up random access to the .tdms file. The .tdms_index file is optional in TDMS applications. If you have disk space limitations, configure the TDMS Open function to stop generating this file.|
The TDM data model structures the meta data into groups and channels, and adds user-defined properties. You can identify whether an element in a file is a group, a channel, or a property.