as may be used in any case where an Extended RValue→ is allowed. That is, in any case where you pass a value to a function, or use a value in a list. more⇛

An RValue in many cases may be replaced with an extended notation, the extended RVAlue. Typically this style of RValue has to be the last one specified in a list of RValues. An Extended-RValue follows the rules documented here. more⇛

Whenever an item reference is encountered during an RValue expansion that item is appropriately expanded. more⇛

with is recognized as one of the Extended RValue→ expansions. It introduces a new map. more⇛

set assigns a value to an item→. more⇛

Call calls another unit, returning to this unit after the call. more⇛

Conditions are used in any case where a branch, or a boolean value is required (as explicitly marked in a function). more⇛

default sets an item to a default value if the item is not yet defined. more⇛

exec is similar to call→ except the called unit is executed in a new Logical Root→. This effectively isolates this unit from the calling test. more⇛

A function can be called in three different manners

• with call→
• as a standalone short name
• as part of a Extended-RValue expansion→

User defined functions may be defined in the Script.FunctionMap context item. more⇛