The Phase identifies a point in the software life cycle at which introduction may occur, while the Note provides a typical scenario related to introduction during the given phase.
The different Modes of Introduction provide information about how and when this weakness may be introduced.
It is not possible for an XML parser to validate all aspects of a document's content because a parser cannot understand the complete semantics of the data.
However, a parser can do a complete and thorough job of checking the document's structure and therefore guarantee to the code that processes the document that the content is well-formed.
The Likelihood provides information about how likely the specific consequence is expected to be seen relative to the other consequences in the list.
For example, there may be high likelihood that a weakness will be exploited to achieve a certain impact, but a low likelihood that it will be exploited to achieve a different impact.