XMLszabály

XMLszabály, or XML Schema, is a language used to define the structure, content, and semantics of XML documents. It provides a way to specify the elements, attributes, and data types that can appear in an XML document, as well as the relationships between them. XML Schema is defined by the World Wide Web Consortium (W3C) and is based on XML syntax.

The primary purpose of XML Schema is to validate XML documents, ensuring that they conform to a specific structure and data type requirements. This is particularly useful in applications where XML is used for data exchange, as it helps to prevent errors and inconsistencies in the data.

XML Schema defines a set of rules for an XML document, including:

- The elements that can appear in the document

- The attributes that can be associated with each element

- The data types of the elements and attributes

- The order in which elements can appear

- The number of times an element can appear (e.g., once, zero or more, one or more)

XML Schema can be used to define complex data structures, including nested elements and attributes, as well as simple data types such as strings, numbers, and dates. It also supports the definition of custom data types, allowing for greater flexibility and precision in data validation.

XML Schema is typically defined in a separate file, which can be referenced by an XML document. This allows for the reuse of schema definitions across multiple XML documents, and makes it easier to maintain and update the schema.

In summary, XML Schema is a powerful tool for defining and validating the structure and content of XML documents. It provides a standardized way to specify the rules for an XML document, ensuring that it conforms to a specific structure and data type requirements. This is particularly useful in applications where XML is used for data exchange, as it helps to prevent errors and inconsistencies in the data.