Apple Newton Utilities User's Guide download pdf (Page 657)

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CHAPTER 18

Intelligent Assistant

About the Assistant 18-11

The Assistant creates a slot in the task frame only when a template is matched. For

example, if the

when_obj template is not matched, the when slot is not created.

If any frame represented in the

signature array is not present (that is, if its

lexicon was not matched) the Assistant may still call your

PostParse method

if it can match an action frame with your task template’s primary action. Your

PostParse method must validate all input and deal with missing objects

appropriately. For example, if your

PostParse method cannot obtain the missing

information by parsing the task frame or looking elsewhere for it (such as in the

appropriate soup), it can display a task slip to solicit further input from the user.

The Task Frame 18

When your PostParse method is called, the ParseUtter function will have

added slots to the task frame. You can use the information in these slots for your

own purposes. For example, your

PostParse method can extract additional

information for use in displaying a task slip.

This section describes the

entries, phrases, noiseWords, value and

origPhrase slots that the ParseUtter function adds to the task frame. These

slots are added only when they are needed to hold information. For example, if no

soup entries are matched in the parsing process, the

entries slot is not added to

the task frame.

The Entries Slot 18

If a template matches a soup entry, an alias to that entry is returned as an element

of the array residing in the

entries slot of the task frame. To retrieve an entry

from this array, use the

GetMatchedEntries global function.

The Phrases Slot 18

The result frame returned by the ParseUtter function contains a phrases slot

that holds an array of strings. Each word in the input phrase that matches a template

is returned as an element of the

phrases array.

For example the following code fragment depicts the

phrases array that might be

returned after parsing the input string

"call Bob".

// input string is "call Bob"

{…

phrases: ["call", "Bob"],

…}

Elements of the phrases array can store more than a single word. For example, if

the parser searches the Names soup for an object of the type

who_obj having the

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