diff --git a/opennlp-docs/src/docbkx/images/parsetree1.png b/opennlp-docs/src/docbkx/images/parsetree1.png
new file mode 100644
index 0000000..bc021a8
--- /dev/null
+++ b/opennlp-docs/src/docbkx/images/parsetree1.png
Binary files differ
diff --git a/opennlp-docs/src/docbkx/parser.xml b/opennlp-docs/src/docbkx/parser.xml
index 4111ece..1a1c332 100644
--- a/opennlp-docs/src/docbkx/parser.xml
+++ b/opennlp-docs/src/docbkx/parser.xml
@@ -27,7 +27,15 @@
 
 	<section id="tools.parser.parsing">
 		<title>Parsing</title>
-		<para>
+		<para>	
+	    A parser returns a parse tree from a sentence according to a phrase structure grammar. A parse tree specifies 
+		the internal structure of a sentence. For example, the following image represents a parse tree for 
+		the sentence 'The cellphone was broken in two days':
+		
+		<imagedata fileref="images/parsetree1.png" scalefit="1"/>
+		
+		A parse tree can be used to determine the role of subtrees or constituents in the sentence. For example, it is possible to 
+		know that 'The cellphone' is the subject of the sentence and the verb (action) is 'was broken.'			
 		</para>
 		
 		<section id="tools.parser.parsing.cmdline">