Redline markup in Rational DOORS

The comparison that generates redline markup in Rational® DOORS® is made on a word by word basis between two static pieces of text. A longest common subsequence algorithm is used. Rational DOORS does not save information about individual keystrokes, so the redline markup might not reflect the sequence of changes performed by the user.

For example, if Rational DOORS compares ship wreck to shipwreck, the redline markup shows ship as deleted, wreck as deleted and shipwreck as inserted.

Rational DOORS uses word level analysis rather than character level analysis for performance reasons.


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