Only Filtering Special Elements at a Specified Location

The product receives data from an upstream component, but only accounts for special elements at a specified location, thereby missing remaining special elements that may exist before sending it to a downstream component.

A filter might only account for instances of special elements when they occur:

This may leave special elements in the data that did not match the filter position, but still may be dangerous.

• relative to a marker (e.g. "at the beginning/end of string; the second argument"), or
• at an absolute position (e.g. "byte number 10").