With powerful grammar primitives and immediate access to hundreds of built-in natural-language token types, the Wolfram Language provides a streamlined system for creating custom natural-language interfaces—and deploying them to the cloud for use in programs, notebooks, forms, and APIs.

GrammarRules — symbolic representation of grammar rules

CloudDeploy — deploy grammar rules to the cloud

GrammarApply — attempt to parse input using a specified grammar

Interpreter — use a deployed grammar in a form, API, etc.

Grammar Elements

"string" — literal text string

StringExpression — arbitrary string pattern

RegularExpression — regular expression in standard notation

GrammarToken — match built-in natural-language domains or define custom ones

Restricted — specify restrictions for built-in grammar tokens

Grammar Construction Primitives

Alternatives (|) — multiple alternative forms

OptionalElement — optionally omitted form, possibly with default

FixedOrder — forms that must appear in a fixed order

AnyOrder — forms that can appear in any order

Repeated (..) — a form that can be repeated any number of times

DelimitedSequence — form repeated with delimiters in between

Pattern (:) — assign a name to use in the grammar action

CaseSensitive — specify that a form must be matched case sensitively

Whitespace  ▪  NoWhitespace  ▪  DigitCharacter  ▪  LetterCharacter

Grammar Actions

RuleDelayed () — define an action to perform when a match is found

Rule () — specify tokens to represent subgrammars

Grammar Options

IgnoreCase — specify whether to ignore uppercase versus lowercase distinctions

AllowLooseGrammar — whether to allow extra grammatical "fluff"

AmbiguityFunction — specify how to handle parsing of ambiguities