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A plain text expression is made up from a string of characters inside double quotes, along with escape characters to allow for special characters to be used. It evaluates to a fixed string (an actual human readable string).

This page describes the syntax for string literal expressions in PhixFlow.

All expressions in PhixFlow are written in the PhixFlow scripting language, //and every expression resolves to one of the following:

  • A regular expresion, following the POSIX style
  • A string literal expression

Regular expressions are used for text pattern-matching, whereas plain text expressions can be used both to do literal character matching and provide output values. In simple terms, writing a plain text expression for a string valued field on a stream would result in a (that) string being output to the database, but a regular expression would have no meaning in this context.

Examples:

If you want the string abc"def.

Use single quotes if you want to embed a double quote (or visa versa), or prefix the quote with a backslash:

e.g. 'abc"def' or "abc\"def".

Note how this contrasts to the regular expression case, where a double-backslash is used to escape special characters.

See Also

Plain Text String

Regular Expressions

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