UnitSystem in UnitDefinition schema (for Volume)

- added an association (1:0..1) between UnitSystem and Unit (kept the name 'BaseUnit' instead of the previously considered 'DefaultUnit')
- added an association (1:0..n) between Unit and UnitSystem- this would be used to generate list of units for a quantity in a particular unit system (not an exhaustive list, needs a review)

Author: lipchev

Common/UnitDefinitions/Volume.json

@@ -29,6 +29,7 @@
       "FromUnitToBaseFunc": "x",
       "FromBaseToUnitFunc": "x",
       "Prefixes": [ "Hecto", "Kilo" ],
+      "UnitSystems": [ "SI", "CGS" ],
       "Localization": [
         {
           "Culture": "en-US",
@@ -45,6 +46,7 @@
       "PluralName": "CubicKilometers",
       "FromUnitToBaseFunc": "x*1e9",
       "FromBaseToUnitFunc": "x/1e9",
+      "UnitSystems": [ "SI", "CGS" ],
       "Localization": [
         {
           "Culture": "en-US",
@@ -64,6 +66,7 @@
       },
       "FromUnitToBaseFunc": "x*1e6",
       "FromBaseToUnitFunc": "x/1e6",
+      "UnitSystems": [ "SI", "CGS" ],
       "Localization": [
         {
           "Culture": "en-US",
@@ -75,11 +78,12 @@
         }
       ]
     },
-	  {
+    {
       "SingularName": "CubicDecimeter",
       "PluralName": "CubicDecimeters",
       "FromUnitToBaseFunc": "x/1e3",
       "FromBaseToUnitFunc": "x*1e3",
+      "UnitSystems": [ "SI", "CGS" ],
       "Localization": [
         {
           "Culture": "en-US",
@@ -96,6 +100,7 @@
       "PluralName": "CubicCentimeters",
       "FromUnitToBaseFunc": "x/1e6",
       "FromBaseToUnitFunc": "x*1e6",
+      "UnitSystems": [ "SI", "CGS" ],
       "Localization": [
         {
           "Culture": "en-US",
@@ -112,6 +117,7 @@
       "PluralName": "CubicMillimeters",
       "FromUnitToBaseFunc": "x/1e9",
       "FromBaseToUnitFunc": "x*1e9",
+      "UnitSystems": [ "SI", "CGS" ],
       "Localization": [
         {
           "Culture": "en-US",
@@ -128,6 +134,7 @@
       "PluralName": "CubicMicrometers",
       "FromUnitToBaseFunc": "x/1e18",
       "FromBaseToUnitFunc": "x*1e18",
+      "UnitSystems": [ "SI", "CGS" ],
       "Localization": [
         {
           "Culture": "en-US",
@@ -142,6 +149,7 @@
     {
       "SingularName": "CubicMile",
       "PluralName": "CubicMiles",
+      "UnitSystems": [ "BI", "USC" ],
       "FromUnitToBaseFunc": "x*4.16818182544058e9",
       "FromBaseToUnitFunc": "x/4.16818182544058e9",
       "Localization": [
@@ -160,6 +168,7 @@
       "PluralName": "CubicYards",
       "FromUnitToBaseFunc": "x*0.764554858",
       "FromBaseToUnitFunc": "x/0.764554858",
+      "UnitSystems": [ "EE", "BI", "USC" ],
       "Localization": [
         {
           "Culture": "en-US",
@@ -177,6 +186,7 @@
       "FromUnitToBaseFunc": "x*0.0283168",
       "FromBaseToUnitFunc": "x/0.0283168",
       "Prefixes": [ "Hecto", "Kilo", "Mega" ],
+      "UnitSystems": [ "EE", "BI", "USC" ],
       "Localization": [
         {
           "Culture": "en-US",
@@ -193,6 +203,7 @@
       "PluralName": "CubicInches",
       "FromUnitToBaseFunc": "x*1.6387*1e-5",
       "FromBaseToUnitFunc": "x/(1.6387*1e-5)",
+      "UnitSystems": [ "EE", "BI", "USC" ],
       "Localization": [
         {
           "Culture": "en-US",
@@ -210,6 +221,7 @@
       "FromUnitToBaseFunc": "x*0.00454609000000181429905810072407",
       "FromBaseToUnitFunc": "x/0.00454609000000181429905810072407",
       "Prefixes": [ "Kilo", "Mega" ],
+      "UnitSystems": [ "BI" ],
       "Localization": [
         {
           "Culture": "en-US",
@@ -226,6 +238,7 @@
       "PluralName": "ImperialOunces",
       "FromUnitToBaseFunc": "x*2.8413062499962901241875439064617e-5",
       "FromBaseToUnitFunc": "x/2.8413062499962901241875439064617e-5",
+      "UnitSystems": [ "BI" ],
       "Localization": [
         {
           "Culture": "en-US",
@@ -243,6 +256,7 @@
       "FromUnitToBaseFunc": "x*0.00378541",
       "FromBaseToUnitFunc": "x/0.00378541",
       "Prefixes": [ "Kilo", "Mega" ],
+      "UnitSystems": [ "USC" ],
       "Localization": [
         {
           "Culture": "en-US",
@@ -259,6 +273,7 @@
       "PluralName": "UsOunces",
       "FromUnitToBaseFunc": "x*2.957352956253760505068307980135e-5",
       "FromBaseToUnitFunc": "x/2.957352956253760505068307980135e-5",
+      "UnitSystems": [ "USC" ],
       "Localization": [
         {
           "Culture": "en-US",
@@ -275,6 +290,7 @@
       "PluralName": "UsTablespoons",
       "FromUnitToBaseFunc": "x*1.478676478125e-5",
       "FromBaseToUnitFunc": "x/1.478676478125e-5",
+      "UnitSystems": [ "USC" ],
       "Localization": [
         {
           "Culture": "en-US",
@@ -315,6 +331,7 @@
       "PluralName": "UkTablespoons",
       "FromUnitToBaseFunc": "x*1.5e-5",
       "FromBaseToUnitFunc": "x/1.5e-5",
+      "UnitSystems": [ "BI" ],
       "Localization": [
         {
           "Culture": "en-US",
@@ -355,6 +372,7 @@
       "PluralName": "UsTeaspoons",
       "FromUnitToBaseFunc": "x*4.92892159375e-6",
       "FromBaseToUnitFunc": "x/4.92892159375e-6",
+      "UnitSystems": [ "USC" ],
       "Localization": [
         {
           "Culture": "en-US",
@@ -387,6 +405,7 @@
       "PluralName": "UsCustomaryCups",
       "FromUnitToBaseFunc": "x*0.0002365882365",
       "FromBaseToUnitFunc": "x/0.0002365882365",
+      "UnitSystems": [ "USC" ],
       "Localization": [
         {
           "Culture": "en-US",
@@ -399,6 +418,7 @@
       "PluralName": "UsLegalCups",
       "FromUnitToBaseFunc": "x*0.00024",
       "FromBaseToUnitFunc": "x/0.00024",
+      "UnitSystems": [ "USC" ],
       "Localization": [
         {
           "Culture": "en-US",
@@ -423,6 +443,7 @@
       "PluralName": "UsBeerBarrels",
       "FromUnitToBaseFunc": "x*0.1173477658",
       "FromBaseToUnitFunc": "x/0.1173477658",
+      "UnitSystems": [ "USC" ],
       "Localization": [
         {
           "Culture": "en-US",
@@ -435,6 +456,7 @@
       "PluralName": "ImperialBeerBarrels",
       "FromUnitToBaseFunc": "x*0.16365924",
       "FromBaseToUnitFunc": "x/0.16365924",
+      "UnitSystems": [ "BI" ],
       "Localization": [
         {
           "Culture": "en-US",
@@ -447,6 +469,7 @@
       "PluralName": "UsQuarts",
       "FromUnitToBaseFunc": "x*9.46352946e-4",
       "FromBaseToUnitFunc": "x/9.46352946e-4",
+      "UnitSystems": [ "USC" ],
       "Localization": [
         {
           "Culture": "en-US",
@@ -459,6 +482,7 @@
       "PluralName": "UsPints",
       "FromUnitToBaseFunc": "x*4.73176473e-4",
       "FromBaseToUnitFunc": "x/4.73176473e-4",
+      "UnitSystems": [ "USC" ],
       "Localization": [
         {
           "Culture": "en-US",
@@ -486,12 +510,27 @@
       },
       "FromUnitToBaseFunc": "x * 5.6826125e-4",
       "FromBaseToUnitFunc": "x / 5.6826125e-4",
+      "UnitSystems": [ "BI" ],
       "Localization": [
         {
           "Culture": "en-US",
           "Abbreviations": [ "pt (imp.)", "UK pt", "pt", "p" ]
         }
       ]
     }
-  ]
+  ],
+  "UnitSystems": [
+    {
+      "UnitSystem": "SI",
+      "BaseUnit": "CubicMeter"
+    },
+    {
+      "UnitSystem": "CGS ",
+      "BaseUnit": "CubicCentimeter"
+    },
+    {
+      "UnitSystem": "EE",
+      "BaseUnit": "CubicFoot"
+    }
+  ] 
 }