===== EDTV/BDTV Profile Introduction =====

==== What is the NCL 3.0 EDTV/BDTV Profile? ====

EDTV is the acronym for Enhanced Digital TV.

The NCL 3.0 Enhanced DTV (EDTV) profile is the standard declarative language
of the Japanese-Brazilian DTV middleware ISDB-T<sub>B</sub> for fixed and
mobile receivers, and also ITU-T Recommendation for IPTV services.

BDTV is the acronym for Basic Digital TV.

The NCL 3.0 Basic DTV (BDTV) profile is a simplification of the EDTV profile
in which transition effects and metadata functionalities are optional.  This
profile is the standard declarative language of the Japanese-Brazilian DTV
middleware ISDB-T<sub>B</sub> for portable receivers.

The following processing instruction must be written in an NCL document in
conformance with these profiles.

<code xml>
<?xml version="1.0"?>
<ncl id="any string" xmlns="http://www.ncl.org.br/NCL3.0/profileName">
</code>

The //profileName//, in the URI path, identifies the language profile
used to specify the document and must be, in this case, //EDTVProfile//
or //BDTVProfile//, respectively.

Fourteen functionality areas with twenty nine modules are used to define the
Enhanced DTV and the Basic DTV profiles.  Attributes and contents (child
elements) of each element of a module may be defined in the module itself or
in the language profile that groups the modules.

In this handbook, each language element is presented in a specific section.
Each of these sections contains a one line element table in which element's
required attributes are underlined.  In these tables, the following symbols
are used: (?) optional (zero or one occurrences), (|) or, (*) zero or more
occurrences, (+) one or more occurrences.  The value of an attribute may not
contain quotation marks (<nowiki>"</nowiki>).  When a value is a string, it must
begin with a letter or an underscore and must contain only letters, digits,
<"."> and "_".