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The following ABNF definition specifies the SNOMED CT template syntax

templateSlot =  templateReplacementSlot / templateInformationSlot

templateReplacementSlot = conceptReplacementSlot / expressionReplacementSlot / tokenReplacementSlot / concreteValueReplacementSlot

conceptReplacementSlot "[[" ws  "+" ws  "id" ws [ "(" ws expressionConstraint ws ")" ws] [slotName ws] "]]"

expressionReplacementSlot  "[[" ws  "+" ws [ "scg" ws] [ "(" ws expressionConstraint ws ")" ws] [slotName ws] "]]"

tokenReplacementSlot  "[[" ws  "+" ws  "tok" ws [ "(" ws slotTokenSet ws ")" ws] [slotName ws] "]]"

concreteValueReplacementSlot = stringReplacementSlot / integerReplacementSlot / decimalReplacementSlot

stringReplacementSlot  = "[[" ws "+" ws "str" ws [ "(" ws slotStringSet ws ")" ws] [slotName ws] "]]"

integerReplacementSlot   = "[[" ws "+" ws "int" ws [ "(" ws slotIntegerSet ws ")" ws] [slotName ws] "]]"

decimalReplacementSlot = "[[" ws "+" ws "dec" ws [ "(" ws slotDecimalSet ws ")" ws] [slotName ws] "]]" 

slotTokenSet = slotToken *(mws slotToken)

slotStringSet  = slotString *(mws slotString)

slotIntegerSet = ( "#" integerValue / slotIntegerRange) *(mws ("#" integerValue / slotIntegerRange))

slotDecimalSet( "#" decimalValue / slotDecimalRange) *(mws ("#" decimalValue / slotDecimalRange))

slotIntegerRange = ( slotIntegerMinimum to [ slotIntegerMaximum ] ) / ( to slotIntegerMaximum )

slotIntegerMinimum = [ exclusiveMinimum ] "#" integerValue

slotIntegerMaximum = [ exclusiveMaximum ] "#" integerValue

slotDecimalRange = ( slotDecimalMinimum to [ slotDecimalMaximum ] ) / ( to slotDecimalMaximum )

slotDecimalMinimum = [ exclusiveMinimum ] "#" DecimalValue

slotDecimalMaximum = [ exclusiveMaximum ] "#" DecimalValue

exclusiveMinimum = ">"

exclusiveMaximum = "<"

slotName  = "@" (nonQuoteStringValue / slotString)

slotToken = definitionStatus / memberOf / constraintOperator / conjunction / disjunction / exclusion / reverseFlag / expressionComparisonOperator / numericComparisonOperator / stringComparisonOperator

slotString  = QM stringValue QM

nonQuoteStringValue  = *(%x21 / %x23-26 / %x28-3F / %x41-5A / %x5C / %x5E-7E)   ; string with no ws, quotes, at or square brackets

templateInformationSlot  = "[[" ws slotInformation ws "]]"

slotInformation = [cardinality ws] [slotName ws]


Please note that some of the rules referenced above are defined elsewhere. In particular, definitionStatus is defined in SNOMED CT compositional grammar, and expressionConstraint, cardinality, to, QM, stringValue, integerValue, decimalValue, ws, mws, memberOf, constraintOperator, conjunction, disjunction, exclusion, reverseFlag, expressionComparisonOperator, numericComparisonOperator and stringComparisonOperator are all defined in the expression constraint language syntax. These rule definitions must therefore be combined with the above syntax before it can be used. 


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