The following table shows the token specifications supported
by the grammar slot type. For more information, see Tokens
| Token type | Example | Supported? |
|---|---|---|
| Single unquoted token | hello | Yes |
| Single unquoted token: non-alphabetic | 2 | Yes |
| Single quoted token, no white space | "hello" | Yes, drop double quotes when it only contains a single token |
| Two tokens delimited by white space | bon voyage | Yes |
| Four tokens delimited by white space | this is a test | Yes |
| Single quoted token, including white space | "San Francisco | No |
| Single XML token in <token> tag | <token>San Francisco</token> | No (same as single quoted token with white space) |
Notes
-
Single quoted token including white space – The specification requires words enclosed in double quotes be treated as a single token. Amazon Lex V2 treats them as white space delimited tokens.
-
Single XML token in <token> – The specification requires words delimited by <token> to represent one token. Amazon Lex V2 treats them as white space delimited tokens.
-
Amazon Lex V2 throws a validation error when either usage is found in your grammar.
Example
<rule id="state" scope="public">
<one-of>
<item>FL</item>
<item>MA</item>
<item>NY</item>
</one-of>
</rule>
