QUDT Release 2.1.38

Continued growth this month.

Updates include:

• Tweaked the LaTeX descriptions of some units
• Added qudt:exactMatch for units that share the same UCUM code
• Split the SHACL validation rules into two sets:
  1. Rules to ensure the consistency of the QUDT graphs
  2. Rules to ensure the correct use of QUDT by users
     As described in the README here, users are able to easily skip running the consistency checks and just validate proper use of QUDT. This greatly speeds up validation.
• Added the quantity kind CO2Equivalent (inspired by @glow-mdsol )
• Fixed an erroneous reference to udUnitsCode for PINT_US-PER-DAY (thanks @glow-mdsol )
• Added a handful of new units (thanks @mgberg)
• Added unit:TeraW-HR-PER-YR (thanks @JurekMueller)
• Added units to publish the flow of pollution caused by factories on a yearly base, as required by EU-laws (thanks @gezever)
• Updated the qudt:symbol values to reflect some commonly used symbols (such as "a" for year (annum)). (thanks @fkleedorfer)
• Added units supporting the Swiss National Forest Inventory (thanks @ahles)

And as always, a big thank-you to all of you for bringing many of these issues to our attention, and even better, for providing submissions to extend the coverage and capabilities of QUDT!