flex xml

<?xml version="1.0" encoding="utf-8"?> 
<mx:Application 
    xmlns:mx="http://www.adobe.com/2006/mxml" 
    viewSourceURL="src/XMLQuery/index.html" 
    width="450" height="290"    
    initialize="initializeHandler();" 
> 
    <mx:Script> 
        <!--[CDATA[ 
            // Model: XML structure describing 
            // some of the books in my collection.    
            [Bindable] 
            private var myBooks:XML = 
                <books> 
                    <book ISBN="1590595181"> 
                        <title>Foundation ActionScript Animation: Making Things Move</title> 
                        <author>Keith Peters</author> 
                        <amazonUrl>http://tinyurl.com/npuxt</amazonUrl> 
                        <pageCount>470</pageCount> 
                    </book> 
                    <book ISBN="1582346194"> 
                        <title>Send in the Idiots: Stories from the Other Side of Autism</title> 
                        <author>Kamran Nazeer</author> 
                        <amazonUrl>http://tinyurl.com/lo5ts</amazonUrl> 
                        <pageCount>500</pageCount> 
                    </book> 
                    <book ISBN="1590592212"> 
                        <title>Flash 3D Cheats Most Wanted</title> 
                        <author>Aral Balkan et. al.</author> 
                        <amazonUrl>http://tinyurl.com/gsd7b</amazonUrl> 
                        <pageCount>256</pageCount> 
                    </book> 
                </books> 
            
            private function initializeHandler():void 
            { 
                // Line length to truncate strings at when 
                // displaying them 
                var lineLength:uint = 50; 
                
                // 
                // Find books with more than 300 pages.                
                // 
                var resultA:XMLList; 
                resultA = myBooks.book.(pageCount > 300); 
                
                // Display the found books using a for each..in 
                // loop. 
                var tempString:String = "<ul>"; 
                for each (var book:XML in resultA) 
                { 
                    tempString += "<li>" + truncate(book.title, lineLength) + "</li>"; 
                } 
                tempString += "</ul>"; 
                aText.htmlText = tempString; 
                
                // 
                // Find book with "Idiots" in the title.         
                // 
                var resultB:XMLList; 
                resultB = myBooks.book.(title.toString().search("Idiots")>-1); 
                
                // Display the title of the found book. 
                bText.htmlText = "<ul><li>" + truncate(resultB.title, lineLength) + "</li></ul>"; 
                
                // 
                // Get the titles of all the books. 
                // 
                var resultC:XMLList; 
                resultC = myBooks.book.title; 
                
                // Display the titles using a for..in loop 
                tempString = "<ul>"; 
                for (var bookTitle:String in resultC) 
                { 
                    tempString += "<li>" + truncate(resultC[bookTitle], lineLength) + "</li>"; 
                } 
                tempString += "</ul>"; 
                cText.htmlText = tempString; 
            } 
            
            // Helper method: Truncate a string at a given character count. Tries 
            // to do this intelligently by truncating at a space if one exists in 
            // the string (so that words are not truncated in the middle). 
            private function truncate ( str:String, numChars:uint, symbol:String = "..." ):String 
            { 
                // Don't do anything if the string is shorter than the maximum value. 
                if (str.length <= numChars) return str; 
                
                // Search backward for a space in the string, starting with 
                // the character position that was requested. 
                var charPosition:uint = numChars-1; 
                while (str.charAt(charPosition) != " " && charPosition != 0) 
                { 
                    charPosition--; 
                } 
                var truncateAt:uint = charPosition == 0 ? numChars : charPosition; 
                
                // If the space is right before a punctuation mark, crop the 
                // punctuation mark also (or else it looks weird). 
                var charBefore:String = str.charAt(truncateAt-1); 
                if (charBefore == ":" || charBefore == ";" 
                    || charBefore == "." || charBefore == ",") 
                { 
                    truncateAt--; 
                } 
                
                // Truncate the string. 
                var newString:String = str.substr(0, truncateAt); 
                newString += symbol; 
                
                // Return the truncated string. 
                return newString; 
            } 
        ]]--> 
    </mx:Script> 
    
    <!-- User interface --> 
    <mx:Panel 
        title="XML lookup results" width="100%" 
        paddingBottom="10" paddingLeft="10" paddingRight="10" paddingTop="10"> 
        <mx:Label text="Query A - Books found:" fontWeight="bold"/> 
        <mx:Text id="aText" width="100%"/> 
        <mx:Label text="Query B - Books found:" fontWeight="bold"/>        
        <mx:Text id="bText" width="100%"/> 
        <mx:Label text="Query C - Books found:" fontWeight="bold"/> 
        <mx:Text id="cText" width="100%"/> 
    </mx:Panel> 
</mx:Application>