A metric is a property of a piece of software.
Lines of code, Cyclomatic complexity, Code coverage
A measure is the value of a metric at a given time
12'000 Lines Of Code, 234 units tests on december 24th
An component is a piece of software regardless of the granularity of this piece
Maven projects, Maven modules, Packages, Classes
Project Tomcat on Nemo
A snapshot is a measures set on a given entity at a given time
Measures set on Tomcat project on december 24th
Don't import java.lang package
Coding rule violation
This is a violation of a coding rule in a particular piece of software. A piece of software can of course contain several violations on the same coding rule.
Line 4 of file "DummyClass" : Don't import java.lang package
Coding rules profile
A coding rules profile is a given coding rules set
Sonar way on Nemo
A plugin is a set of extensions that put together brings a new functionality to Sonar
PL/SQL plugin, Clover plugin
Coding rules extension
A quantitative measure is a measure that indicates the size of something in a project
# of lines of code, # of classes, ...
A qualitative measure is a measure that gives some indication on the quality of the project
Cyclomatic complexity per method, RCI, ...