Upgrade to QUDT 3

CHANGELOG.md

@@ -7,6 +7,38 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+
+- Upgrade to QUDT 3.1.4
+  - Calculation of scalings and factor units now happens in QUDT (see PR [1129](https://github.com/qudt/qudt-public-repo/pull/1129))
+    However, a few things have changed:
+    - rename `qudt:isScalingOf` to `qudt:scalingOf`
+    - rename `qudt:factorUnit/qudt:unit` to `qudt:hasFactorUnit/qudt:hasUnit`
+  - Currency units have changed:
+    - they were moved back into the graph 'http://qudt.org/vocab/unit/'
+    - their localnames have received the prefix `CCY_`
+    - both changes are 'soft', ie, the old way is still available, but deprecated
+    - for example: `http://qudt.org/vocab/currency/EUR` is now `http://qudt.org/vocab/unit/CCY_EUR`.
+    - QUDTLib makes the change now instead of adopting the deprecation, as there are other breaking changes as well, so upgrading will require work anyway.
+    - for QUDTLib constants, this means that the pattern `${CurrencyName}_Currency` is dropped in favor of the QUDT style `CCY_${CurrencyName}`, e.g. `Qudt.Units.EUR_Currency` becomes `Qudt.Units.CCY_EUR`
+  - Many conversion multipliers were changed in QUDT. They now consistently have at most 34 significant digits (ie, BigDecimal's precision of 34). This fixes problems such as the one reported in [Conversion error from MilliSV__PER__HR to MicroSV__PER__HR](https://github.com/qudtlib/qudtlib-java/issues/109).
+  - scalings of `unit:GM` deserve special mention:
+    - in the upcoming QUDT release we have `unit:GM qudt:scalingOf unit:KiloGM`, making `qudt:scalingOf` and `qudt:conversionMultiplier` consistent in all cases
+    - QUDTLib makes the change as well, with the effect that unit factorization does not use `Units.GM` (which probably surprised a few people) for the mass dimension but `Units.KiloGM` (which is what one would expect)
+  - Sorting in `Qudt.derivedUnitListFromFactorUnits` now takes more aspects into account and ordering has changed in some cases.
+  - When creating a Unit instance, its factor units are checked for factors `x^N^M`, where x has no more factors.
+    Such factors are simplified as x^(N*M). The same is applied to newly instantiated `FactorUnits` objects.
+
+### Fixed
+
+- Fixed a sorting bug in `Qudt.derivedUnitListFromFactorUnits` that caused wrong sorting for some very similar units.
+
+### Added
+
+- `Unit.dependents` - the number of units that refer to that unit as one of its factor units or are scaled from that base unit.
+  this value is required to achieve better sorting in `Qudt.derivedUnitListFromFactorUnits`, allowing to prefer
+  more important units (those with more dependents)
+
 ## [6.8.1] - 2025-01-29
 
 ### Fixed
@@ -93,13 +125,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
-- Simplified BEST_MATCH algorithm for obtaining a unit from a set of factor units. Recent additions to the data model (isScalingOf and factorUnit relationships) led to a larger set of candidates and the complexity of the previous algorithm led to very high computation time.
+- Simplified BEST_MATCH algorithm for obtaining a unit from a set of factor units. Recent additions to the data model (scalingOf and factorUnit relationships) led to a larger set of candidates and the complexity of the previous algorithm led to very high computation time.
 - Changed the behaviour of Unit.hasFactorUnits() such that for a FactorUnits object with only one top-level factor unit (such as [N^1]), the method returns false.
 
 ### Fixed
 
 - `unit:MHO`, `unit:MicroMHO`: fix dimension vector and quantity kind
-- `unit:F`: fix `unit:isScalingOf`
+- `unit:F`: fix `unit:scalingOf`
 
 ## [6.1.0] - 2024-01-05
 

pom.xml

@@ -49,7 +49,7 @@
         <maven.compiler.source>17</maven.compiler.source>
         <maven.compiler.target>17</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <qudt.release.version>2.1.47</qudt.release.version>
+        <qudt.release.version>3.1.4</qudt.release.version>
         <spotless.format.version>1.25.0</spotless.format.version>
     </properties>
 
@@ -331,6 +331,12 @@
                 </plugins>
             </build>
         </profile>
+        <profile>
+            <id>skip-test</id>
+            <properties>
+                <maven.test.skip>true</maven.test.skip>
+            </properties>
+        </profile>
     </profiles>
     <distributionManagement>
         <snapshotRepository>

qudtlib-constants-gen/src/main/java/io/github/qudtlib/constgen/ConstantsGenerator.java

@@ -30,7 +30,6 @@ public class ConstantsGenerator {
     // input data
     private static final String DATA_UNITS = "qudtlib/qudt-units.ttl";
     private static final String DATA_QUANTITYKINDS = "qudtlib/qudt-quantitykinds.ttl";
-    private static final String DATA_CURRENCY = "qudtlib/qudt-currency.ttl";
     private static final String DATA_PREFIXES = "qudtlib/qudt-prefixes.ttl";
     private static final String DATA_SYSTEMS_OF_UNITS = "qudtlib/qudt-systems-of-units.ttl";
     private static final String DATA_PHYSICAL_CONSTANTS = "qudtlib/qudt-constants.ttl";
@@ -148,9 +147,6 @@ private Map<String, Object> getConstantNamesByQuery(String queryFile, String...
                             typeName.substring(0, 1).toLowerCase()
                                     + typeName.substring(1)
                                     + "FromLocalnameRequired";
-                    if (typeName.equals("Unit") && constName.endsWith("_Currency")) {
-                        valueFactory = "currencyFromLocalnameRequired";
-                    }
                     Constant constant =
                             new Constant(
                                     constName,

qudtlib-data-gen/src/main/java/io/github/qudtlib/data/DataGenerator.java

@@ -35,27 +35,20 @@ public class DataGenerator {
 
     // QUDT files
     private static final String UNITS_FILE = "qudt/vocab/unit/VOCAB_QUDT-UNITS-ALL.ttl";
-    private static final String CURRENCIES_FILE =
-            "qudt/vocab/currency/VOCAB_QUDT-UNITS-CURRENCY.ttl";
     private static final String PREFIXES_FILE = "qudt/vocab/prefixes/VOCAB_QUDT-PREFIXES.ttl";
     private static final String QUANTITYKINDS_FILE =
             "qudt/vocab/quantitykinds/VOCAB_QUDT-QUANTITY-KINDS-ALL.ttl";
 
     private static final String CONSTANTS_FILE = "qudt/vocab/constants/VOCAB_QUDT-CONSTANTS.ttl";
 
     // queries
-    private static final String FACTOR_UNITS_QUERY = "factorUnit.rq";
-    private static final String IS_SCALING_OF_QUERY = "isScalingOf.rq";
     private static final String MISSING_UNITS_QUERY = "missing-units.rq";
-    private static final String DELETE_KILOGM_SCALINGS_QUERY = "delete-kiloGM-scalings.rq";
     private static final String DELETE_UNITS_QUERY = "delete-units.rq";
 
-    private static final String DELETE_FROM_UNITS_BY_QUERY_PATTERN =
-            "delete-from-units-by-query[N].rq";
-    private static final String DELETE_FROM_QUANTITYKINDS_BY_QUERY_PATTERN =
-            "delete-from-quantitykinds-by-query[N].rq";
+    private static final String UPDATE_UNITS_BY_QUERY_PATTERN = "update-units-by-query[N].rq";
+    private static final String UPDATE_QUANTITYKINDS_BY_QUERY_PATTERN =
+            "update-quantitykinds-by-query[N].rq";
     // additional data
-    private static final String SI_BASE_UNITS_DATA = "si-base-units.ttl";
     private static final String ADD_TO_UNITS = "add-to-units.ttl";
     private static final String ADD_TO_QUANTITYKINDS = "add-to-quantitykinds.ttl";
     private static final String DELETE_FROM_UNITS = "delete-from-units.ttl";
@@ -137,11 +130,9 @@ private void processQuantityKinds() {
         Repository outputRepo = new SailRepository(new MemoryStore());
         try (RepositoryConnection outputCon = outputRepo.getConnection()) {
             RdfOps.addStatementsFromFile(outputCon, QUANTITYKINDS_FILE);
-            RdfOps.addStatementsFromFile(outputCon, CURRENCIES_FILE);
             RdfOps.updateDataUsingQuery(outputCon, DELETE_UNITS_QUERY);
             // remove unwanted individual triples
-            RdfOps.updateDataUsingNQueries(
-                    outputCon, DELETE_FROM_QUANTITYKINDS_BY_QUERY_PATTERN, 5);
+            RdfOps.updateDataUsingNQueries(outputCon, UPDATE_QUANTITYKINDS_BY_QUERY_PATTERN, 5);
             RdfOps.removeStatementsFromFile(outputCon, DELETE_FROM_QUANTITYKINDS);
             // add missing triples
             RdfOps.addStatementsFromFile(outputCon, ADD_TO_QUANTITYKINDS);
@@ -157,30 +148,20 @@ void processUnits() {
             try (RepositoryConnection outputCon = outputRepo.getConnection()) {
                 // start with the original units data in the INPUT repo
                 RdfOps.addStatementsFromFile(inputCon, UNITS_FILE);
-                RdfOps.addStatementsFromFile(inputCon, CURRENCIES_FILE);
-                // deal with kg
-                RdfOps.updateDataUsingQuery(inputCon, DELETE_KILOGM_SCALINGS_QUERY);
                 // if we have identified wrong data in this query, remove it
-                RdfOps.updateDataUsingNQueries(inputCon, DELETE_FROM_UNITS_BY_QUERY_PATTERN, 5);
+                RdfOps.updateDataUsingNQueries(inputCon, UPDATE_UNITS_BY_QUERY_PATTERN, 5);
                 // remove unwanted individual triples
                 RdfOps.removeStatementsFromFile(inputCon, DELETE_FROM_UNITS);
                 // add missing triples
                 RdfOps.addStatementsFromFile(inputCon, ADD_TO_UNITS);
-                // add SI base units
-                RdfOps.addStatementsFromFile(outputCon, SI_BASE_UNITS_DATA);
                 // put result in OUTPUT repo
                 RdfOps.copyData(inputCon, outputCon);
                 // add prefixes to INPUT repo (cannot be in output, but is required for queries!)
                 RdfOps.addStatementsFromFile(inputCon, PREFIXES_FILE);
-                // find isScalingOf where missing, write result in INPUT and OUTPUT repos
+                // find scalingOf where missing, write result in INPUT and OUTPUT repos
                 if (DEBUG) {
                     RdfOps.writeTurtleFile(inputCon, new File("/tmp/scaling-data.ttl").toPath());
                 }
-                RdfOps.addDataUsingQuery(inputCon, IS_SCALING_OF_QUERY, inputCon, outputCon);
-                // find factor units, write result in INPUT and OUTPUT repos
-                RdfOps.addDataUsingQuery(inputCon, FACTOR_UNITS_QUERY, inputCon, outputCon);
-                // we generate some units in the above, add basic unit info for those, write to
-                // INPUT and OUTPUT repos
                 RdfOps.addDataUsingQuery(inputCon, MISSING_UNITS_QUERY, inputCon, outputCon);
                 copyNamespaces(inputCon, outputCon);
                 // write units file from OUTPUT repo
@@ -215,7 +196,7 @@ private void compareWithExpected(RepositoryConnection outputCon) {
                                 .collect(Collectors.toList()));
         RdfOps.message(
                 "\n\nExpected data subset of generated: " + Models.isomorphic(actual, expected));
-        compareForProperty(expected, actual, QUDT.isScalingOf);
+        compareForProperty(expected, actual, QUDT.scalingOf);
         compareForProperty(expected, actual, QUDTX.factorUnit);
     }
 

qudtlib-data-gen/src/main/resources/add-to-units.ttl

@@ -1,53 +1,2 @@
-@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
-@prefix qudt: <http://qudt.org/schema/qudt/> .
-@prefix unit: <http://qudt.org/vocab/unit/> .
-
-unit:DEG_C2
-  qudt:symbol "°C²" .
-
-unit:GM-PER-M2-HR
-  qudt:symbol "g/m²·hr" .
-
-unit:GM-PER-M2-YR
-  qudt:symbol "g/m²·yr" .
-
-unit:GM-PER-M3-CentiPOISE
-  qudt:symbol "g/(m³·cP)" .
-
-unit:GM-PER-M3-PA-SEC
-  qudt:symbol "g/(m³Pa·s)" .
-
-unit:KiloGM-PER-M2-DAY
-  qudt:symbol "kg/(m²·d)" .
-
-unit:KiloTONNE-PER-YR
-  qudt:symbol "kt/yr" .
-
-unit:MegaGM-PER-HA-YR
-  qudt:symbol "Mg/(ha·yr)" .
-
-unit:MegaJ-PER-M2-DAY
-  qudt:symbol "MJ/(m²·d)" .
-
-unit:MicroGM-PER-GM-HR
-  qudt:symbol "μg/(g·h)" .
-
-unit:MicroGM-PER-L-DAY
-  qudt:symbol "μg/(L·d)" .
-
-unit:MicroMOL-PER-M2-SEC2
-  qudt:symbol "μmol/(m²·s²)" .
-
-unit:MilliM-PER-M2
-  qudt:symbol "mm/m²" .
-
-unit:MilliMOL-PER-M2-HR
-  qudt:symbol "mmol/(m²·h)" .
-
-unit:NanoMOL-PER-GM-HR
-  qudt:symbol "nmol/(g.h)" .
-
-unit:NanoMOL-PER-M2-SEC
-  qudt:symbol "nmol/(m²·s)" .