Static inheritance systems and methods

A class extension system comprising:

• a super class component;
• and
• a static subclass component that provides a type alias for the super class component.

A data interaction system comprising:

• a program component;
• and
• an interface component that retrieves data from a data source in response to requests for the program component, the interface component including one or more base classes and static subclasses, the static subclasses providing functionality specifically related to the data source schema.

A class extension system comprising:

• a means for receiving a class;
• and
• a means for extending the functionality of the class via a subclass without adding a new dynamic type that differs from the dynamic type of the class.

A computer readable medium having stored thereon data structures comprising:

• a class;
• and
• a static subclass that extends class behavior without extending class state.

A type check system for extended classes comprising:

• a retriever component that retrieves super class and static subclass components;
• and
• a type check component that analyzes the class components and generates an error if the subclass is specified such that it could extend super class state.

A class extension method comprising:

• identifying a base class;
• and
• generating a static subclass that extends base class behavior without extending base class state.

A method of extending a programming language to support XML data queries for particular schemas comprising:

• identifying a class that provides a method to access an XML node;
• and
• generating one or more static subclasses that extend the identified class in accordance with an XML schema.