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Intellifilter

Intellifilter is a programmable feature that permits users to free their systems from hard coded dependence on a specific printer that is no longer maintainable, or able to meet the demands of the application.

A filter monitors the incoming data stream for specified character sequences

(strings). When it detects a specified string, it can delete it, substitute or insert another string, and/or pass control to another filter. The main purposes of a filter are to strip unwanted strings, to replace strings with strings compatible with the printer, and to insert commands that modify the presentation of the data that follow.

Filter Structure and Logic

A filter contains one or more action segments. Each segment defines one target and the actions to take upon matching it. Generally the order of the segments within the filter is inconsequential.

Each action segment is composed of the mandatory command, TARGET, followed by at least one and no more than two optional commands, within which there can be nor more than one exclusive command. If CHANGE-

FILTER is present, it must be last.

Table 23. Intellifilter Commands

Command

TARGET “string”

Mandatory/

Optional

Mandatory

DELETE

INSERT “string”

Exclusive &

Optional

Exclusive &

Optional

PRECEDE “string” Exclusive &

Optional

REPLACE “string” Exclusive &

Optional

CHANGE-FILTER

NEWFLTR.CFG

Optional

Specifies a string to be sought within the incoming data stream.

Removes each occurrence of the TARGET string from the data stream.

Adds the specified string after each occurence of the

TARGET string.

Replaces the specified string before each occurrence of the TARGET string with the specified string.

Replaces the specified string before each occurrence of the TARGET string with the specified string.

Transfers control of the Intellifilter to the specified filter.

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