For these purposes of intended unit representation, an optional conceptual attribute with a default value of false exists on a unit, as shown in Listing 5.
为了达到有意单元表示的目的，在这个单元上有一个带有错误默认值的非强制性概念性属性，如清单5所示。
2
Canonicalization creates a standard representation of XML, addressing issues like the tag representation, attribute ordering, namespace declaration, expansion and ordering, and white space handling.
If the original article link could not be detected either, the link to the alternate entry resource representation is given, as specified in the link element with rel attribute having alternate value.