--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/IMPL/DOM/Schema/Property.pm	Fri Sep 04 19:40:23 2015 +0300
@@ -0,0 +1,67 @@
+package IMPL::DOM::Schema::Property;
+use strict;
+use warnings;
+
+use IMPL::declare {
+	require => {
+		Label => 'IMPL::DOM::Schema::Label',
+		DOMNode => 'IMPL::DOM::Node',
+		ValidationError => 'IMPL::DOM::Schema::ValidationError'
+	},
+	base => [
+		'IMPL::DOM::Schema::SimpleNode' => sub {
+	        my %args = @_;
+	        
+	        $args{maxOccur} = 1;
+	        $args{minOccur} = delete $args{optional} ? 0 : 1;
+	        $args{nodeName} ||= 'Property';
+	        
+	        return %args;
+	    }
+	],
+	props => [
+		messageRequired => { get => 1, set => 1, dom => 1 }
+	]
+};
+
+sub CTOR {
+    my ($this,%args) = @_;
+    
+    $this->messageRequired($args{messageRequired} || 'A property %schemaNode.name% is required in the %node.qname%');
+}
+
+sub Validate {
+    my ($this,$node,$ctx) = @_;
+    
+    my $nodeValue = $node->nodeProperty($this->name);
+        
+    if (length $nodeValue) {
+    	# we have a value so validate it
+    	
+    	# buld a pseudo node for the property value 	
+    	my $nodeProp = DOMNode->new(nodeName => '::property', nodeValue => $nodeValue);
+        
+        return $this->SUPER::Validate($nodeProp);
+        
+    } elsif($this->minOccur) {
+        # we don't have a value but it's a mandatory property
+        return ValidationError->new(
+            message => $this->_MakeLabel($this->messageRequired),
+            node => $node,
+            schemaNode => $this
+        );
+    }
+    return ();
+}
+
+sub _MakeLabel {
+	my ($this,$label) = @_;
+	
+	if ($label =~ /^ID:(\w+)$/) {
+		return Label->new($this->document->stringMap, $1);
+	} else {
+		return $label;
+	}
+}
+
+1;