<lexicon>

This element refers to an external lexicon document that is to be used to tune text-to-speech synthesis.

A lexicon can be a user-defined dictionary, ruleset, or ActivePrompt database:

• User dictionaries guide pronunciation.

• User rulesets translate text expressions into regular expressions.

• ActivePrompt databases automatically map text to recordings or text to hand-tuned synthesis instructions.

A <lexicon> element must appear as the immediate child of a <prompt> element.

Attributes

This section describes the attributes you can set for the <lexicon> element.

Name	Data type	Default
type	CDATA	optional
uri	CDATA	required

type

The desired media type for the lexicon, if the lexicon resource indicated in the uri attribute is available in more than one type.

It is usually best to omit the type attribute, and instead ensure that the web server returns the appropriate media type for each lexicon based on the file extension.

The possible type values are:

• application/edct-bin-dictionary for a Vocalizer binary format user dictionary

• application/x-vocalizer-rettt+text for a text user ruleset

• application/x-vocalizer-rettt+bin for a binary user ruleset

• application/x-vocalizer-activeprompt-db for an ActivePrompt database, optionally with “;mode=automatic” appended to override its default matching mode

uri

The uniform resource identifier for the dictionary, ruleset, or ActivePrompt database to be used.

Children

None.

Parents

• <prompt>

Sample code

<lexicon uri="http://myserver/american_english.bdc"/>