Validating xsd file Sms sex chat uk bi
This is one of the more significant ways in which XML Schema differs from DTDs.For example, an attribute might be constrained to hold only a valid date or a decimal number.The most obvious features offered in XSD that are not available in XML's native Document Type Definitions (DTDs) are namespace awareness and datatypes, that is, the ability to define element and attribute content as containing values such as integers and dates rather than arbitrary text.The XSD 1.0 specification was originally published in 2001, with a second edition following in 2004 to correct large numbers of errors. Technically, a schema is an abstract collection of metadata, consisting of a set of schema components: chiefly element and attribute declarations and complex and simple type definitions.
Complex types describe the permitted content of an element, including its element and text children and its attributes.
The XML Schema data model includes: This collection of information is called the Post-Schema-Validation Infoset (PSVI).
The PSVI gives a valid XML document its "type" and facilitates treating the document as an object, using object-oriented programming (OOP) paradigms.
The main components of a schema are: Other more specialized components include annotations, assertions, notations, and the schema component which contains information about the schema as a whole.
Simple types (also called data types) constrain the textual values that may appear in an element or attribute.
When an instance document is validated against a schema (a process known as assessment), the schema to be used for validation can either be supplied as a parameter to the validation engine, or it can be referenced directly from the instance document using two special attributes, .