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CHANGELOG.md

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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project is in the process of adopting Semantic Versioning.

Unreleased

Changed

  • Removed invalid qudt:iec61360Code values (most in the 'UAD' range) from about 40 units, most notably unit:M that was submitted as a bug.
  • Cleaned out some remaining shape and restriction references to deprecated properties.

Added

Deprecated

  • Replaced unit:PPTR_VOL with unit:PPT_VOL
  • Deprecated 7 remaining units with non-uppercase URIs, replacing as appropriate.

3.0.0 - 2025-02-13

Changed

  • Replaced 2.1 with $$QUDT_VERSION$$ in all graph URI references. This will result in URIs containing full semantic versions, such as 3.0.0, moving forward. Note that this is a breaking change, hence the transition to QUDT version 3. Versionless graph URIs are still dereferenceable on the web.

Deprecated

  • Removed all previously deprecated entities, to begin a new cycle of deprecation when needed.

Fixed

  • Corrected unit symbols containing some kind of conversion artifact, e.g. ''
  • Fix dimension vector of unit:MicroMOL-PER-M2-SEC2
  • Added the newly referred-to dimension vector to the dv vocabulary
  • Corrected 456 unit symbols of derived unist by generating them based on their factors. Note: correcting derived unit symbols without correcting their factor units (e.g. km/hr -> km/h without hr->h) will not solve the problem in the long term. We are not yet automatically detecting and correcting incorrect derived unit symbols but it might happen in the future. If we started doing that, the factors would take precedence.
  • Corrected the language tag @en-us to @en-US
  • Corrected a small number of conversion multipliers

2.1.47 - 2025-01-28

Added

  • New SHACL Schema for Datatypes
    • Changed file name from SCHEMA_QUDT-DATATYPE_NoOWL.ttl to SCHEMA_QUDT-DATATYPES_NoOWL.ttl
    • Scalar datatypes unchanged
    • Structured datatypes have extensive changes
    • Future work:
      • completion of heterogeneous and multi-dimensional arrays and vectors
      • completion of structured datatypes such as records and tables
      • completion of SHACL rules for validation
  • New folder examples under src/
  • New graphs with examples of Quantities and Datatypes
    • EXAMPLES_QUDT-DATATYPES.ttl for valid examples
    • EXAMPLES_QUDT-INVALID-DATATYPES.ttl has invalid examples
  • New classes and shapes added to SHACL QUDT Schema:
    • DataItem was added as a parent class for Data, supporting scalar values, and, with subtypes for structured values
  • New QuantityKinds
  • New Units
  • New Dimension Vectors
  • New QA Tests
    • Added SHACL shapes for checking content under src/ only
  • New Inferences
    • Added a SHACL rule to generate inverse triples for symmetric relations (such as qudt:exactMatch)

Changed

  • Migrated constructs for datatypes to:
    • new SHACL Schema for Datatypes
      • Updated OWL Schema is work-in-progress
    • existing VOCAB for Datatypes
  • Changes to the SHACL QUDT schema:
    • Added a value constraint to the property shape qudt:Quantifiable-value to allow a value to be a qudt:EnumeratedValue, and to allow a list of values.
    • qudt:informativeReference can now refer to instances of qudt:Citation as well as xsd:anyURI
  • Removed the vaem:revision triples that were causing retention of v2.1 strings in the URIs
  • qudt:informativeReference triples added/replaced by a link to IEC CDD generated based on qudt:iec61360Code triples by Vladimir Alexiev

Fixed

  • Corrected numerous issues in the datatypes SHACL schema and the QUDT SHACL schema
  • Corrected the qudt:ucumCode of unit:TeraW-HR-PER-YR to "TW.h/a" by Jurek Müller
  • Fixed non-working informativeReference links in units vocabulary Phil Blackwood
  • Added some missing rdfs:isDefinedBy triples

2.1.46 - 2024-12-09

Added

  • QUDT Schema
    • Add the qudt:altSymbol property to support using multiple symbols with a unit/quantitykind alongside the primary one, which isqudt:symbol
  • New QuantityKinds
    • qk:AmountOfSubstanceIonConcentration as a narrower kind of qk:Concentration.
    • qk:CoefficientOfPerformance by lazlop
    • qk:CompoundPlaneAngle
    • qk:CountRate (units: unit:NUM-PER-SEC, unit:NUM-PER-HR, unit:NUM-PER-YR)
    • qk:CurrentOfTheAmountOfSubstance (replacesqk:CurrentOfTheAmountOfSubtance)
    • qk:RotationalFrequency (units: unit:Hz, unit:REV-PER-MIN, unit:REV-PER-HR, unit:REV-PER-SEC)
    • qk:VaporPermeability (unit: unit:KiloGM-PER-PA-SEC-M)
    • qk:VaporPermeance (for what used to be qk:VaporPermeability, see 'Changed')
  • New Units
    • unit:CYC-PER-SEC
    • unit:KiloLM
    • unit:CD-PER-KiloLM
    • unit:CI (replaces unit:Ci)
    • unit:FLIGHT (replaces unit:Flight)
  • Other Additions

Changed

  • Enforce at most a single qudt:symbol for all instances.
  • Delete spurious qudt:symbol values in a number of quantity kinds
  • Correct the conversion offset for MilliDEG_C
  • Rename qk:VaporPermeability to qk:VaporPermeance and change all unit associations accordingly.
  • Unify PER-X symbols to the 15:1 majority pattern, "/x" where "1/x" is used
  • Unify NUM-PER-X symbols to always represent NUM as # (as has already been used in unit:NUM)
  • Remove qk:NumberDensity from unit:PER-M3
  • Make qk:RotationalFrequency exactMatch of qk:RotationalVelocity, remove broader qk
  • Make qk:AngularFrequency exactMatch of qk:AngularVelocity, remove broader qk

Deprecated

  • unit:Ci (replaced by: unit:CI)
  • unit:Flight (replaced by: unit:FLIGHT)
  • qk:CurrentOfTheAmountOfSubtance (replaced by qk:CurrentOfTheAmountOfSubstance)
  • unit:CFU (replaced by: unit:NUM) - The CFU (colony forming unit) is a context-dependent unit that should be part of an ontology with narrower scope than QUDT.

2.1.45 - 2024-11-15

Changed

  • Changed the name of the collections folder to validation.
  • Remove all version suffixes from all source files, i.e., -v2.1.ttl becomes .ttl

Fixed

  • Added skos:broader relations to a number of quantity kinds that had none. Note that it is ok for a quantity kind to have no broader quantity kind, but these were missing.
  • Changed the erroneously used 'qudt:hasDimensionVector' property in vocab/types/VOCAB_QUDT_DATATYPES-v2.1.ttl file with with a new property qudt:dimensions that denotes the dimensions of a matrix.
  • Introduced a maven based build process to automate the manual tasks required for merging PRs and making releases. This change does not affect the content of the ontologies.
  • Replaced (hopefully) all occurrences of hr as a symbol for unit:HR with h.
  • Add unit:NUM-PER-MilliL

2.1.44 - 2024-10-27

Fixed

  • A new quantity kind, ElevationRelativeToNAP, has been added to support the Amsterdam Ordnance System (thanks @RiX012).
  • Big housecleaning month! Many of the unused graphs that have been lying around the repository have been moved to a behind-the-scenes repository, including references to some of the unused concepts in our active graphs. If you have been quietly using them yourself in your own work and would like us to restore any of them, please let us know in a new Issue. Otherwise, we now have a more streamlined repository while retaining all the functionality you have been depending on.
  • The qudt:currencyNumber relation now points to a string with the currency code, rather than an integer. This makes sense because it is not used for computation - it is a code in the true sense. (Thanks for this fix, @fkleedorfer)
  • A number of units now point to quantitykind:MassConcentration in addition to MassDensity and Density. (thanks @J-meirlaen). (MassDensity and Density are already declared as qudt:exactMatch. MassConcentration will be included in these declarations in the future.)