Religious law refers to the notion of a religious system or document being used as a legal source, though the methodology used varies. For example, the use of Jewish and Halakha for public law has a static and unalterable quality, precluding amendment through legislative acts of government or development through judicial precedent; Christian Canon law is more similar to civil law in its use of codes; and Islamic Sharia law (and Fiqh jurisprudence) is based on legal precedent and reasoning by analogy ("Qiyas"), and is thus considered similar to common law.