OntoDL Statement: set: Unterschied zwischen den Versionen
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(→Semantics of the set-operator) |
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| <font face="arial" size="2">for Mode=concat: insert a demiter between the concatenated strings</font> | | <font face="arial" size="2">for Mode=concat: insert a demiter between the concatenated strings</font> | ||
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|- style="vertical-align:top" | |- style="vertical-align:top" | ||
| ''QualifierValueMode'' | | ''QualifierValueMode'' | ||
| := | | := | ||
| − | | '''default''' | '''overwrite''' | '''no-overwrite''' | '''concat''' | '''append''' | + | | '''default''' | '''overwrite''' | '''no-overwrite''' | '''concat''' | '''append''' | '''add''' |
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| := | | := | ||
| '''default''' | '''value''' | '''reference''' | | '''default''' | '''value''' | '''reference''' | ||
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| concat | | concat | ||
| − | | If a and b are strings, the result is a concatenation of both string. If a is a collection of strings, b will be appended to each element of the collection. Collection elements may be filtered by qualifiers (e.g. <br><font face=courier>set me.Designation[Language=de] =[Mode=concat] ($ (German)</font><br> | + | | If a and b are strings, the result is a concatenation of both string. If a is a collection of strings, b will be appended to each element of the collection. Collection elements may be filtered by qualifiers (e.g. <br><font face=courier>set me.Designation[Language=de] =[Mode=concat] ($ (German)</font><br> appends the text "(German)" to all German designations in the collection.<p> |
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| ab | | ab | ||
| ''error'' | | ''error'' | ||
| { b } | | { b } | ||
| {a<sub>1</sub>b, .. , a<sub>n</sub>b} | | {a<sub>1</sub>b, .. , a<sub>n</sub>b} | ||
| + | | ''error'' | ||
| + | |- style="vertical-align:top" | ||
| + | | add | ||
| + | | a and b must be strings representing a numeric value. The result is a string holding the arithmetic sum of a and b. If a is a collection of numeric strings, b will be added to each number element of the collection. | ||
| + | | a+b | ||
| + | | ''error'' | ||
| + | | { b } | ||
| + | | {a<sub>1</sub>+b, .. , a<sub>n</sub>+b} | ||
| ''error'' | | ''error'' | ||
|- style="vertical-align:top" | |- style="vertical-align:top" | ||
Version vom 10. September 2016, 09:46 Uhr
Syntax
| SetStatement | := | set InternalReference = SetModeQualifier* AssignedValue | ||
| AssignedValue | := | InternalReference | ||
| | | = QualifiedConcept | |||
| | | = Text | |||
| SetModeQualifer | := | [ Mode = QualiferValueMode ] | controls the overall behavior of the set-statement (see below) | |
| | | [ Copy = QualiferValueCopy ] | copy-by-value vs. copy-by-reference | ||
| | | [ Delimiter = Name ] | for Mode=concat: insert a demiter between the concatenated strings | ||
| QualifierValueMode | := | overwrite | no-overwrite | concat | append | add | ||
| QualifierValueCopy | := | value | reference |
Semantics of the set modes
| Mode | Sematics | a=string b=string |
a=object b=object |
a=empty collection | a=collection b=string |
a=collection b=object |
|---|---|---|---|---|---|---|
| concat | If a and b are strings, the result is a concatenation of both string. If a is a collection of strings, b will be appended to each element of the collection. Collection elements may be filtered by qualifiers (e.g. set me.Designation[Language=de] =[Mode=concat] ($ (German) appends the text "(German)" to all German designations in the collection.
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ab | error | { b } | {a1b, .. , anb} | error |
| add | a and b must be strings representing a numeric value. The result is a string holding the arithmetic sum of a and b. If a is a collection of numeric strings, b will be added to each number element of the collection. | a+b | error | { b } | {a1+b, .. , an+b} | error |
| no-overwrite | The set operation is only performed if a is empty. If a already carries a value or is a non-empty collection, the value of a will not be altered. | a | a | { b } | { a } | { a } |
| overwrite | The value of a is overwritten by b. In case a is a collection, b will be set as the only element of the collection. Collection elements may be filtered by qualifiers (e.g. set me.Designation[Language=de] =[Mode=overwrite] NULL removes all German language designation from the list). |
b | b | { b } | { b } | { b } |
| append | If a is a collection, b will be appended to that collection. | error | error | { b } | { a1, .., an, b } | { a1, .., an, b } |
| default | The default behavior is Overwrite for single strings/objects and Append to List for collections | b | b | { b } | { a1, .., an, b } | { a1, .., an, b } |
If no Mode qualifier is given, the behavior of the set-statement is like [Mode=default].
