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XFA Specification

Chapter 3, Object Models in XFA

Scripting Object Model

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</calculate>

</field>

</calculate>

</field>

…

</subform>

</template>

</xdp>

Inferred Index for Ancestors of the Container

The same logic that is used at the level of the script's container also applies to ancestors or siblings of

ancestors which match an unqualified SOM expression. In each case, the target's index defaults to the

index of the ancestor or ancestor's sibling at the same level of the hierarchy. The result of this rule is that if

a cell in a table contains a SOM expression that references another table, the SOM expression defaults to

referencing the corresponding cell in the other table. For example, a form has been created to calculate

trip times. In one field the user enters his estimated average driving speed in kilometres per hour. The form

also displays two 5 by 5 tables. The first table shows distances between cities in kilometres and the second

shows estimated travel times between the same cities in hours. The content of each cell in the second

table is calculated based upon the corresponding cell in the first table. The template contains:

</subform>

Speed</script>