XML::DTD::AttDef - Perl module representing the AttDef part of an

  XML::DTD::AttDef - Perl module representing the AttDef part of an
  ATTLIST declaration in an XML DTD.

  use XML::DTD::AttDef;
  my $entman = XML::DTD::EntityManager->new;
  my $atd = XML::DTD::AttDef::new($entman,$name,$atttype,$defaultdecl);

  XML::DTD::AttDef is a Perl module representing the AttDef part of an
  ATTLIST declaration in an XML DTD. The following methods are
  provided.

package XML::DTD::AttDef;

use 5.008;
use strict;
use warnings;

our @ISA = qw();

our $VERSION = '0.09';


# Constructor
sub new {
  my $arg = shift;
  my $man = shift;
  my $name = shift;
  my $type = shift;
  my $dflt = shift;
  my $ws0 = shift;
  my $ws1 = shift;
  my $ws2 = shift;

  my $cls = ref($arg) || $arg;
  my $obj = ref($arg) && $arg;

  my $self;
  if ($obj) {
    # Called as a copy constructor
    $self = { %$obj };
    bless $self, $cls;
  } else {
    # Called as the main constructor
    $self = { };
    bless $self, $cls;
    $self->_parse($man, $name, $type, $dflt, $ws0, $ws1, $ws2);
  }
  return $self;
}


# Determine whether object is of this type
sub isa {
  my $cls = shift;
  my $r = shift;

  if (defined($r) && ref($r) eq $cls) {
    return 1;
  } else {
    return 0;
  }
}


# Write component-specific part of the XML representation
sub writexmlelts {
  my $self = shift;
  my $xmlw = shift;

  $xmlw->open('attdef', {'name' => $self->{'NAME'},
			 'ltws' => $self->{'WS0'}});
  $xmlw->open('atttype', {'ltws' => $self->{'WS1'}});
  $xmlw->pcdata($self->type);
  $xmlw->close;
  $xmlw->open('defaultdecl', {'ltws' => $self->{'WS2'}});
  $xmlw->pcdata($self->default);
  $xmlw->close;
  $xmlw->close;
}


# Return the attribute name
sub name {
  my $self = shift;

  return $self->{'NAME'};
}


# Return the attribute type
sub type {
  my $self = shift;

  return $self->{'ATTTYPE'};
}


# Return the attribute default declaration
sub default {
  my $self = shift;

  return $self->{'DEFAULTDECL'};
}


# Parse the element declaration
sub _parse {
  my $self = shift;
  my $entman = shift;
  my $name = shift;
  my $type = shift;
  my $dflt = shift;
  my $ws0 = shift;
  my $ws1 = shift;
  my $ws2 = shift;

  $name = $entman->peexpand($name)
    if ($name =~ /^%([\w\.:\-_]+);$/);

  $self->{'NAME'} = $name;
  $self->{'ATTTYPE'} = $type;
  $self->{'DEFAULTDECL'} = $dflt;
  $self->{'WS0'} = _lftoce($ws0);
  $self->{'WS1'} = _lftoce($ws1);
  $self->{'WS2'} = _lftoce($ws2);
}


# Substitute the 
 char entity for linefeeds
sub _lftoce {
  my $txt = shift;

  $txt =~ s/\n/\&\#xA;/g;
  return $txt;
}


1;
__END__