Changes to the UnitsML Schema [unitsmlSchema-n.n.n.xsd] Location: http://unitsml.nist.gov/Schema/schema_changes.txt Version: 0.9.12 Date : July 09, 2008 * Added complexType MethodParameterType with @name * Added global elements ServiceMethod (simple) & MethodParameter (complex) * Added complexType WSDLConversionFromType which contains: attributes @ID (optional), @WSDLURI (required), & WSDLMethod (required) elements: Conversion Description (0···inf), ServiceMethod (1), MethodParameter (1···inf) * Added global elemet WSDLConversionFrom (complex) * Modified ConversionsType to include a child element WSDLConversionFrom (0···inf) * Added @lang to ItemType * Removed "item" from the enumerated list for EnumeratedRootUnitType/ @unit * Changed DimensionType/ AmountSubstance to AmountOfSubstance * Added @dimensionless (optional, default=1) to DimensionType * Added DimensionChoiceType for consideration; contains: elements Dimensionless (simple) and Dimensioned (complex) ---------------------------------------------------------------------------------------------- Version: 0.9.11 Date : June 24, 2008 * Changed Unit/ UnitNote to Unit/ UnitVersionHistory * Changed Quantity/ QuantityNote to Quantity/ QuantityVersionHistory * Added ItemType with @itemIdentifier, @itemName, @itemSymbol, @powerNumerator, and @powerDenominator * Added Element Item (Type ItemType; optional, unbounded) as a child to the Dimension element. * Added SpecialConversionFrom/ @conversionURI to allow for an external description or convertor. * Changed SpecialConversionFrom/ ConversionDescription element to be optional. ---------------------------------------------------------------------------------------------- Version: 0.9.10 Date : January 16, 2008 * Created optional DimensionSet at the same level as UnitSet and QuantitySet - Moved Dimension from Quantity to DimensionSet - Dimension element is set to be required and unbounded - Added dimensional exponents (@powerNumerator & @powerDenominator) to each specific dimension element; e.g., Length, Mass, etc. - These 2 attributes are global (used in RootUnits) and both have default values of 1. * Changed Unit/ @unitID to be required. * Added Unit/ @dimensionReference (global; xsd:anyURI) to reference the dimension of a unit. * Added Quantity/ @dimensionReference to reference the dimension of a quantity. * Added 'Unit' to Unit/ Symbol, Note, Definition, History, & Remark. * Added 'Quantity' to Quantity/ Symbol. * Added Quantity/ QuantityNote (0-1), QuantityDefinition (0-1), QuantityHistory (0-unbounded), & QuantityRemark (0-unbounded). * Changed Quantity/ @quantityType (enumerated: 'base' or 'derived') to be optional. * Removed unused elements: Prefix, PrefixName. * Rearranged order of elements and complex types; added comments. ---------------------------------------------------------------------------------------------- Version: 0.9.9 Date : September 12, 2007 * In the enumerated @unit list in EnumeratedRootUnitType: - changed 'celsius' to 'degree_Celsius'; - changed 'fahrenheit' to 'degree_Fahrenheit'; - changed 'rankine' to 'degree_Rankine'; - changed 'electron_volt' to 'electronvolt'; - changed 'KNT' to 'knot'; - changed 'stoke' to 'stokes'; - changed 'oint' to 'pint'; - added 'torr'; - changed 'atmosphere' to 'standard_atmosphere'; - added 'unified atomic mass unit'. - Note 'unified atomic mass unit' is defined to be one twelfth of the mass of an unbound atom of the carbon-12 nuclide, at rest and in its ground state; whereas the 'atomic unit of mass', m_e, is the mass of an electron. ---------------------------------------------------------------------------------------------- Version: 0.9.8 Date : June 9, 2007 * Changed Unit/ @alphanumericID to unitID and changed the type from token to ID. * Changed Unit/ @symbolicID to symbol. * Changed Unit/Conversion/SpecialConversion to SpecialConversionFrom; and changed the SpecialConversionType to SpecialConversionFromType. * Added SpecialConversionFrom/ @initialUnit. * Changed Quantity/UnitReference from being required to be optional and unbounded. * Modified and/or added annotation where appropriate. ---------------------------------------------------------------------------------------------- Version: 0.9.7 Date : May 8, 2007 * Removed Unit/ @powerNumerator and @powerDenominator. * Removed Unit/ Prefix element. * Corrected annotation due to removal of Unit element within Quantity element. * Corrected Float64ConversionFrom/ @finalAddendDecimalPlace from unsignedByte to byte. * Changed CodeListValue/@locationUri to @locationURI. * Added CodeListValue/@agencyURI; rearranged attribute order. * Added an optional SpecialConversion element in ConversionsType. * The SpecialConversionType includes @ID, @lang, and Description element of NoteType. * In ConversionsType, changed Float64ConversionFrom element to be optional. * Added U95UncertaintyRadius attributes for conversion factors. * In the UnitType, added @timeStamp of type dateTime. - time-stamp change indicates substantive change in unit; e.g., change in conversion factor. - UnitsDB version change indicates non-substantive change; e.g., unit names in other languages added. * Added 22 atomic units and 10 natural units to the enumerated @unit list in EnumeratedRootUnitType. - Changed atomic_mass_unit to atomic_unit_of_mass. * Added @lang attributes where appropriate. ---------------------------------------------------------------------------------------------- Version: 0.9.6 Date : April 10, 2007 * Added optional ConversionNote to Unit/ConversionFromType. * Unit/System & @type changed from required to optional. * Renamed ConversionFrom element to Float64ConversionFrom. * Float64ConversionFrom/ @unitDocument and @unitID were combined into @initialUnit, which is a combination URI and ID. * Changed the type for the four value attributes of Float64ConversionFrom element from string to double. * Added two attributes (unsignedBytes) for significant Digits of the @multiplicand and @divisor values of the Float64ConversionFrom element. * Added two attributes (bytes) for DecimalPlaces of the @initialAddend and @finalAddend values of the Float64ConversionFrom element. * Changed occurrences of numeric to alphanumeric when appropriate. * Changed some types to be more restrictive, but more appropriate; e.g., string to token. * Removed the Unit/Representation element and its children; the funcionality of this element has been replaced with the RootUnits and Conversions elements. * Added global elements (CodeListValues & CodeListValue) for listing unit code values from multiple code lists. * Changed the ThermodynamicTemperatureType/@symbol fixed value from "Theta" to "Θ". * Removed the Unit element as a child of the Quantity element; added a UnitReference element. * Rearranged order of some elements to be consistent throughout the schema. * Made minor typographical corrections. ---------------------------------------------------------------------------------------------- Version: 0.9.5 Date : March 13, 2007 * Changed BaseUnits, EnumeratedBaseUnit, ExternalBaseUnit to RootUnits, EnumeratedRootUnit, ExternalRootUnit, respectively. * Changed the enumerated prefix value of micro from the Greek 'mu' to u. * Added the binary prefixes (Ki, Mi, etc.) to the enumerated list of prefixes. * Changed the 'label' attribute in the ExternalRootUnitType to 'annotation'. * Changed the enumerated list of units (in the EnumeratedRootUnitType) from the previous list containing UN/CEFACT codes to a basically English list of unit names, mostly in lower case, with a few uppercase exceptions, e.g., 32F, mmHg & pH. * In the EnumeratedRootUnitType, made the prefix, powerNumerator, and powerDenominator attributes global. * Added the global attributes prefix, powerNumerator, and powerDenominator to the ExternalRootUnitType. * The following two items are described in the "Revising the 'Representation' Element in UnitsML", by Peter Linstrom; March 12, 2007. * Added the global elements Conversions and ConversionFrom and the associated complex types ConversionsType and ConversionFromType. The Conversions element is a child of the Unit element and the ConversionFrom element is a child of the Conversions element. * Added eight (8) attributes to the ConversionFrom element: id, unitDocument, unitID, initialAddend, multiplicand, divisor, finalAddend, and exact. ---------------------------------------------------------------------------------------------- Version: 0.9.4 Date : February 12, 2007 * Enumerated unit attribute with list of 210 units provided by Peter Linstrom. * Enumerated prefix attribute to values: Y Z E P T G M k h da d c m µ n p f a z y * Added attributes unit, label & source to ExternalBaseUnit. * Added attributes unit, prefix, numerator & denominator to EnumeratedBaseUnit. * Added optional elements EnumeratedBaseUnit & ExternalBaseUnit into the BaseUnits element. * Added optional BaseUnits element into the Unit element. * Created Global Types: BaseUnitsType, EnumeratedBaseUnitType, and ExternalBaseUnitType. * Removed PrefixSetType, PrefixSet, and reference to PrefixSet in UnitsML. ---------------------------------------------------------------------------------------------- Version: 0.9.3 Date : November 3, 2006 * UnitRepresentationType Attribute powerNumerator - default added = "1" Attribute powerDenominator - default added = "1" * UnitType Attribute powerNumerator - default added = "1" Attribute powerDenominator - default added = "1" * PrefixType Attribute prefixSystem - use changed from required to optional; default added = "SI" Attribute base - use changed from required to optional; default added = "10" ---------------------------------------------------------------------------------------------- Version: 0.9.2.1 Date : August 16, 2006 * PrefixType 1) prefixSystem changed from required to optional; default value set to SI 2) base changed from required to optional; default value set to 10 * UnitType & UnitRepresentationType 3) powerNumerator default value set to 1 4) powerDenominator default value set to 1 ---------------------------------------------------------------------------------------------- Version: 0.9.2 Date : July 24, 2006 * Schema documentation added * Attribute prefixSymbol from the Unit element removed * Reference to Prefix in the Unit element added * Type asciisymbols (with prefix symbol enumuration) removed; it was not used * "QuantityReferenceType -> reference" changed to "QuantityReferenceType -> quantityID" ---------------------------------------------------------------------------------------------- Version: 0.9.1 Date : June 23, 2006 * changed ThermoTemp to ThermodynamicTemperature * changed ThermoTempType to ThermodynamicTemperatureType * powerNumerator is now required instead of optional * deleted the unused attribute quantSymRef * changed the attribute asciiSymbol to be the entity "Symbol" minOccurs="0" maxOccurs="unbounded" * for element renamed the attribute "type" to "quantityType" * for element renamed the attribute "system" to "prefixSystem" * for element renamed the attribute "asciiSymbol" to be the entity "Symbol" minOccurs="0" maxOccurs="unbounded" * deleted the attribute "prefixSymbolReference" ---------------------------------------------------------------------------------------------- Version: 0.9 Date : May 22, 2006 * NoteType added * ConversionFactor -> "note" changed to "ConversionNote" from type Note * Element Unit -> UnitNote from type Note added ---------------------------------------------------------------------------------------------- Version: 0.8.1 Date : May 11, 2006 * enumeration removed from Unit -> System -> Type ---------------------------------------------------------------------------------------------- Version: 0.8 Date : May 10, 2006 * Attributes added to UnitsType * Element Symbol added to Units * Enumuration element "non-SI" from SystemType changed to "not acceptable" * Attribute name "ref" in QuantityReferenceType changed to "reference" * Attribute "name" added to QuantityReferenceType * Datatype changed in "prefixReference", "unitReference", "prefixSymbolReference", "quantSymRef" from "IDREF" to "string" ---------------------------------------------------------------------------------------------- Version: 0.7.3 Date : May 09, 2006 * changes on naming * declaring dimension elements own types * make dimension elements global ---------------------------------------------------------------------------------------------- Version: 0.7.2 Date : May 08, 2006 * minOccurs="0" maxOccurs="1" added to dimensionType elements * minOccurs="0" maxOccurs="1" added to ref="Dimension" * extension base="xsd:byte added to dimensionType elements ---------------------------------------------------------------------------------------------- Version: 0.7 Date : May 05, 2006 * Element QuantitySet/Quantity/UnitRef to a Reference to element Unit * Removed elements UnitReference and Type UnitReference * Attributes in element QuantitySet/Quantity/Dimension to elements with own symbol attributes ----------------------------------------------------------------------------------------------