The Wikipedia:Wikipedia definition of the word Wikipedia:canon includes the following definition:

In fiction, canon is the officially authorized interpretation of characters and events. It is also sometimes described as "part of a fictional universe which has inarguable validity within". In fandom, the term is often used to distinguish between "canonical" accounts (i.e. those authorized by the copyright holder) and those of fanfiction, sometimes called fanon. In serial fiction, new material can contradict earlier material (a practice known as retconning), in which case the new material becomes canon. Publishers, especially in mainstream comic books, sometimes release "what-if" stories featuring non-canonical interpretations of their characters.

The canon for Sharpe's Wiki are the novels of Bernard Cornwell, relating to Richard Sharpe and his career. It has beennoted that there are occasional continuity differences in the Sharpe novels, usually caused by the continued extension of the Sharpe story, and the fact the novels were witten out of sequence. Where possible, these will be noted within Sharpe's Wiki. The novels trump the television series when differences between the two appear, such will also be noted withing the wiki when possible.