This document, SCTE 130 Part 2, describes the Digital Program Insertion Advertising Systems Interfaces' core messaging and data types using extensible markup language (XML), XML Namespaces, and XML Schema. Core messaging includes the extensible message schemas, the common SCTE 130 message attributes, and the required SCTE 130 messages. The core data types are XML attributes and XML elements which may be used in any SCTE 130 message element or within any SCTE 130 element definition.