"This Recommendation describes the high-level functionalities of the lightweight interactive multimedia framework (LIME) for IPTV. LIME supports functionalities in IPTV terminal devices to provide interactivity and a variety of content such as audio@ video@ graphics and text. Expected services include additional data such as text to enrich TV programmes@ and two-way portal pages. This Recommendation describes the profile (called ""LIME-HTML"") of XHTML1.0 [b-W3C XHTML]@ the profile (called ""LIME-CSS"") of cascading style sheets 1(CSS1)@ and a part of CSS2@ the profile of document object model (DOM) (called ""LIME-DOM"")@ and a script language (called ""LIME-Script"") that is a subset of ECMAScript but has functional extensions required for IPTV services. It describes the use of IP-based protocols for transport of LIME and IPTV-related services."