DAISY multimedia can be a book, magazine, newspaper, journal, computerized text, or a synchronized presentation of text and audio. It provides up to six embedded "navigation levels" for content, including embedded objects such as images, graphics, and MathML. In the DAISY standard, navigation is enabled within a sequential and hierarchical structure consisting of (marked-up) text synchronized with audio. The original DAISY 2 specification (1998) was based on HTML and SMIL. The DAISY 2.02 revision (2001) was based on XHTML and SMIL. DAISY 3 (2005) is based on XML and is standardized as ANSI/NISO Z39.86-2005.