Regional lists of widely common surnames consist of those family names most often occurring within the total population of a region. Lists of most common surnames by region: List of most common surnames in Asia. Lists of East Asian surnames; List of most common surnames in Europe; List of most common surnames in North America
Extensible Markup Language (XML) is a markup language that defines a set of rules for encoding documents in a format which is both human-readable and machine-readable. It is defined by the W3C 's XML 1.0 Specification and by several other related specifications, all of which are free open standards.t is a textual data format with strong support via Unicode for different human languages. Although the design of XML focuses on documents, it is widely used for the representation of arbitrary data structures such as those used in web services.
The primary purpose of a schema language is to specify what the structure of an XML document can be. This means which elements can reside in which other elements, which attributes are and are not legal to have on a particular element, and so forth.3C XML Schema does not implement most of the DTD ability to provide data elements to a document. Although W3C XML Schema's ability to add default attributes to elements is an advantage, it is a disadvantage in some ways as well.