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Rules for Global Items

  • Article

The following rules are established for reporting global items in descriptors.

  • A logical range must be provided for all usages.
  • The minimum physical size of a digitizer is one square inch.
  • The recommended (and minimum) time stamp usage report data size is 16 bits.
  • Reported values must always be within the logical range. The only exception is when the usage includes support for NULL values.