Elo TouchSystems 1525L manual Field Type Example Description

		Section 4. Magnetic Card Data Parsing
Field Type	Example	Description
Literal	^	A literal is placed in the string as is and is
		used to determine if a particular format
		should be applied and to mark the end of a
		variable-length field.
Non-ASCII literal	\r, \n, \\, \xhh	Specify an escape character or non-ASCII
		character.
		• \r is converted to <CR>
		• \n is converted to <LF>
		• \\ is converted to \
		• \xhh is converted to a character with
		ASCII value hh (always two hex
		digits).
Optional choice	(xy…)	The field specifies a choice where the data
		can be either a literal or a property field.
		There may be any number of literals
		specified but there may not be more than
		1 property field, for example
		(=<country_code[3]>). If the character is
		a ‘=’, skip it; otherwise store the next
		three characters into a property named
		“country_code”.
Optional field	[x]	Specifies an optional sequence that may
		or may not be present in the data. x may
		be one or more literal fields, property
		fields, or optional choice fields.
Optional track	{xy}	The data parser will not enforce that the
		track be present in the data when
		attempting to match the data to the
		template or rule. x must be a literal field
		or an optional choice field containing a
		literal. y may be any sequence of fields
		except for another optional track field.

There can be more than one rule specified for a particular format template. The rules should be placed in a single string enclosed in curly braces (i.e., ‘{’ and ‘}’) and delimited with commas ‘,’. When the driver applies rules for a particular template, it sequentially attempts to apply each rule in the order it is provided in the fmtx_rules string. For example: “{rule 1},{rule 2},{rule 3}” would cause the driver to first try to apply rule 1. If the incoming data did not match rule 1, the driver attempts to apply rule 2 followed by rule 3 if rule 2 fails. If no rules can be applied, the driver attempts to match the incoming data to the next template.

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