Data Format Description Language (DFDL) v1.0 Specification
OGF Proposed Recommendation GFD-P-R.174, January 31, 2011


14. Sequence Groups

The following properties are specific to sequences.

Property Name

Description

sequenceKind

Enum

Valid values are 'ordered', 'unordered'

When 'ordered', this property means that the contained items of the sequence will be encountered in the same order that they appear in the schema, which is called schema-definition-order.

When 'unordered', this property means that the items of the sequence will be encountered in any order. Repeating instances of the same element do not need to be contiguous. The children of an unordered sequence MUST be xs:element otherwise it is a schema definition error.

Annotation: dfdl:sequence, dfdl:group (sequence)

initiatedContent

Enum

Valid values are 'yes', 'no'

When 'yes' 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. If the child is optional then it is deemed to have been found when its initiator has been found. Any subsequent error parsing the child will not cause the parser to backtrack to try other alternatives.

When 'no', the children of the sequence may have their dfdl:initiator property set to the empty string.

Annotation: dfdl:sequence, dfdl:choice, dfdl:group

A sequence can have an initiator and/or a terminator as described earlier.

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