Concatenate Value of Children

The concatenate rule can be used to build a value by appending values generated by its children in the order of their definition.

If a string separator is defined then it is inserted between each value of two consecutive children.

If the separator is an expression, that expression will be evaluated only once at the initialization of the generator. Every value generated by the Concatenate will use the same separator value computed at initialization time.

It is also possible to hide some of the children of a Concatenation by adding then in the exclusion list.

This rule is used usually for generating CSV record from a set of children (each providing values for each column of the records).

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