Dev:Multiplicity: Difference between revisions
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The section ''Multiplicity'' in element documentation pages reports the occurence indicators of the respective element, by name the values of ''minOccurs'' and ''maxOccurs''. For example, in <tt><{{IS: | The section ''Multiplicity'' in element documentation pages reports the occurence indicators of the respective element, by name the values of ''minOccurs'' and ''maxOccurs''. For example, in <tt><{{wiki2|IS:ocpRef_path#Multiplicity_.2F_Anzahl_.2F_Multiplicit.C3.A9|ocpRef}}></tt> ({{rml|2}}) the multiplicity is depicted with [2..2], which means, that ''minOccurs''=''maxOccurs''=2 resp., every <tt><{{wiki2|IS:path}}></tt> requires exactly two instances of <tt><{{wiki2|IS:ocpRef_path|IS:ocpRef}}></tt>. | ||
The default values for ''minOccurs'' and ''maxOccurs'' are 1, which means that on default an element has to be used exactly once, like in {{ | The default values for ''minOccurs'' and ''maxOccurs'' are 1, which means that on default an element has to be used exactly once, like in <tt><{{wiki2|IS:trackTopology_#Multiplicity_.2F_Anzahl_.2F_Multiplicit.C3.A9|IS:trackTopology}}></tt> ({{rml|2}}) and in <tt><{{wiki3|IS:topology}}></tt> ({{rml|3}}). | ||
As an element cannot be employed a negative number of times or halve a time, ''minOccurs'' and ''maxOccurs'' have to be non-negative integers. ''maxOccurs'' must be ≥''minOccurs''. ''maxOccurs'' may be unbounded (∞), as | As an element cannot be employed a negative number of times or halve a time, ''minOccurs'' and ''maxOccurs'' have to be non-negative integers. ''maxOccurs'' must be ≥''minOccurs''. ''maxOccurs'' may be unbounded (∞/*), as with {{Tag|IS|track}}. | ||
==For Further Reading== | ==For Further Reading== | ||
*{{external|https://www.w3schools.com/xml/schema_complex_indicators.asp}} | *{{external|https://www.w3schools.com/xml/schema_complex_indicators.asp}} | ||
[[Category:GeneralDescription]] | |||
Latest revision as of 06:14, 15 November 2022
Multiplicity
The section Multiplicity in element documentation pages reports the occurence indicators of the respective element, by name the values of minOccurs and maxOccurs. For example, in <ocpRef> (railML® 2) the multiplicity is depicted with [2..2], which means, that minOccurs=maxOccurs=2 resp., every <IS:path> requires exactly two instances of <IS:ocpRef>.
The default values for minOccurs and maxOccurs are 1, which means that on default an element has to be used exactly once, like in <IS:trackTopology> (railML® 2) and in <IS:topology> (railML® 3).
As an element cannot be employed a negative number of times or halve a time, minOccurs and maxOccurs have to be non-negative integers. maxOccurs must be ≥minOccurs. maxOccurs may be unbounded (∞/*), as with <track>.
For Further Reading
- https://www.w3schools.com/xml/schema_complex_indicators.asp (external link)