[DFDL-WG] Missing OccursCountKind

[Alan Powell]

Tim has pointed out that as currently defined it is not possible to define 
an array where the number of occurrences is determined by the initiator. 
For example

Scalar1: xxxxx
Array: xxxx
Array: xxxx
Scalar2: xxx

It is inconsistent that dfdl can identify optional elements using 
speculative parsing but not a variable number of occurrences.


occursCountKind
Enum
Specifies how the actual number of occurrences is to be established. 
Valid values ?stopValue?, ?explicit?, 'implicit'? or ?useAvailableSpace?
?explicit? means use the value of the dfdl:occursCount property.
?implicit? means use the value of the maxOccurs on the declaration. It is 
a schema definition error if the value for minOccurs is not equal to 
maxOccurs.
?useAvailableSpace? means the occurrences fill the available space which 
is limited by a containing construct.
?stopValue? means look for a logical stop value which signifies the end of 
the occurrences.
Annotation: dfdl:element


Suggestions for  new enumeration: 
'parsed' ,  The number of occurrences is determined by parsing until a 
non-matching element is encountered.
change 'implicit' to mean between minOccurs and maxOccurs


As an addition should we allow the dfdl:initiatedContent property on 
arrays if we agree to make it discriminating?

initiatedContent
Booloean
When 'true' indicates that all the children of the sequence are initiated. 
It is a schema definition error if any children have their dfdl:initiator 
property set to the empty string.
When 'false', the children of the sequence may have their dfdl:initiator 
property set to the empty string.
Annotation: dfdl:sequence, dfdl:choice, dfdl:group 


Alan Powell

 MP 211, IBM UK Labs, Hursley,  Winchester, SO21 2JN, England
 Notes Id: Alan Powell/UK/IBM     email: alan_powell at uk.ibm.com 
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