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<value></value>

Creates a single value from its contents or some other source. This is mainly useful to build the elements in array or mapping contexts. E.g:

<set variable="var.arr" type="array"> <value>apple</value> <value>orange</value> <value>banana</value> </set> &var.arr;

Array result: ({"apple", "orange", "banana"})

This tag takes a "type" attribute to set the type of its content, just like e.g. <set>. That can be useful e.g. to build arrays inside arrays:

<value type="array"> <value>1</value> <value type="array"> <value>1.1</value> <value>1.2</value> </value> <value>2</value> </value>

Array result: ({"1", ({"1.1", "1.2"}), "2"})

Note that a variable with an array value is normally spliced into an array context. Here too an extra <value> tag is useful to make it a nested array:

<set variable="var.x" split=",">a,b</set> <value type="array"> <!-- Insert all the elements in var.x --> &var.x; <!-- Compare to the following that adds the var.x array as a single element. --> <value>&var.x;</value> </value>

Array result: ({"a", "b", ({"a", "b"})})

Attributes

type

type=type

The type of the content and the result (except if it's "array" - then the result is "any" to avoid splicing the array into the surrounding array, as shown above). Defaults to "any".

index

Used when the surrounding type is a mapping. This specifies the index for the value. E.g:

<value type="mapping"> <value index="1">first</value> <value index="2">second</value> <value index="3">third</value> </value>

Mapping result: (["1": "first", "2": "second", "3": "third"])

This attribute cannot be left out when a mapping is constructed, and it must not be given otherwise.

from

from=string

Get the value from this variable. The content must be empty if this is used.

expr

expr=string

An expression that gets evaluated to produce the value. The content must be empty if this is used.