Canonical XML

Reading : Canonical x m l
Field :
Expression of information markup language XML Canonical XML

Proper description specification in orderlogically completely to describe the identical XML document as identical ones.It is used with the electronic signature and the like with XML.As for XML because there is a pliability in recording mode, being the same contents, it is possible to do the description which is different.

For example, there being a XHTML documentof the completely same contents, <IMG> insidethe tagit declares WIDTH attribute on the one hand before from HEIGHT attribute, as for another side it assumes that it had declared in the order of opposite. In this case, as a result even identically it is judged as the XML document which differs in spite,with simple character string comparison.

In addition,there isalso a possibility the XML document of the same contents makingseparate ones by the difference and the like of encoding type. When such inscription "it is off-center",because electronic signature effectively functioning it stops doing, if it is the XML documentof the same contents, as completely described, as the same character stringthe fact that it is decided by W3C is Canonical XML.