Symbol Tag not there #487

In my project I Have to handle "Symbol" tag, Earlier i have got a crash for it, I Created new Class "SVGSymbolElement" which is extended "SVGElement" (Just like SVGDefsElement), Then i used the SVGSymbolElement in "SVGKParserDefsAndUse" class.

I added "Symbol" tag in the array as below

-(NSArray*) supportedTags
{
return [NSMutableArray arrayWithObjects: @"defs",@"symbol", @"use", nil];
}

Then In the below method i just used a "defs" tag because i feel the code may take care of the functinality. I have added else if for symbol and write same code as defs.

After this the crash is fixed but I see the issue, What ever there in "Symbol" tag is not Drawing.

Can you please help

(Node) handleStartElement:(NSString *)name document:(SVGKSource) SVGKSource namePrefix:(NSString)prefix namespaceURI:(NSString) XMLNSURI attributes:(NSMutableDictionary )attributes parseResult:(SVGKParseResult *)parseResult parentNode:(Node) parentNode
{
if( [[self supportedNamespaces] containsObject:XMLNSURI] )
{

NSString* qualifiedName = (prefix == nil) ? name : [NSString stringWithFormat:@"%@:%@", prefix, name];

if( [name isEqualToString:@"defs"])
{
/** NB: must supply a NON-qualified name if we have no specific prefix here ! */
SVGDefsElement *element = [[SVGDefsElement alloc] initWithQualifiedName:qualifiedName inNameSpaceURI:XMLNSURI attributes:attributes];

return element;

}
else if( [name isEqualToString:@"symbol"])
{
/ NB: must supply a NON-qualified name if we have no specific prefix here ! */
SVGSymbolElement *element = [[SVGSymbolElement alloc] initWithQualifiedName:qualifiedName inNameSpaceURI:XMLNSURI attributes:attributes];

return element;

}**

else if( [name isEqualToString:@"use"])
{
/** NB: must supply a NON-qualified name if we have no specific prefix here ! */
SVGUseElement *useElement = [[SVGUseElement alloc] initWithQualifiedName:qualifiedName inNameSpaceURI:XMLNSURI attributes:attributes];

[useElement postProcessAttributesAddingErrorsTo:parseResult]; // handles "transform" and "style"

if( [attributes valueForKey:@"x"] != nil )
    useElement.x = [SVGLength svgLengthFromNSString:[((Attr*)[attributes valueForKey:@"x"]) value]];
if( [attributes valueForKey:@"y"] != nil )
    useElement.y = [SVGLength svgLengthFromNSString:[((Attr*)[attributes valueForKey:@"y"]) value]];
if( [attributes valueForKey:@"width"] != nil )
    useElement.width = [SVGLength svgLengthFromNSString:[((Attr*)[attributes valueForKey:@"width"]) value]];
if( [attributes valueForKey:@"height"] != nil )
    useElement.height = [SVGLength svgLengthFromNSString:[((Attr*)[attributes valueForKey:@"height"]) value]];

NSString* hrefAttribute = [useElement getAttributeNS:@"http://www.w3.org/1999/xlink" localName:@"href"];

NSAssert( [hrefAttribute length] > 0, @"Found an SVG <use> tag that has no 'xlink:href' attribute. File is invalid / don't know how to parse this" );
if( [hrefAttribute length] > 0 )
{
    NSString* linkHref = [((Attr*)[attributes valueForKey:@"xlink:href"]) value];

    NSAssert( [linkHref hasPrefix:@"#"], @"Not supported: <use> tags that declare an href to something that DOESN'T begin with #. Href supplied = %@", linkHref );

    linkHref = [linkHref substringFromIndex:1];

    /** have to find the node in the DOM tree with id = xlink:href's value */
    SVGElement* linkedElement = (SVGElement*) [parseResult.parsedDocument getElementById:linkHref];

    NSAssert( linkedElement != nil, @"Found an SVG <use> tag that points to a non-existent element. Missing element: id = %@", linkHref );


    useElement.instanceRoot = [self convertSVGElementToElementInstanceTree:linkedElement outermostUseElement:useElement];
}

return useElement;

}
}

return nil;
}

In Demo project We have a SVG with file name "struct-use-09-b.svg" it is having "Symbol" tag. But is not used any where (I dont know the reason), I added to the "Licenses.plist" to access it but not able to open it, Attaching the screen shot

I got the below in the console

2016-10-13 13:54:02:904 Demo-iOS[11195:601351] [SVGKSourceLocalFile] MISSING FILE (not found in App-bundle, not found in Documents folder), COULD NOT CREATE DOCUMENT: filename = struct-use-09-b, extension = svg
2016-10-13 13:54:02:926 Demo-iOS[11195:601351] [SVGKFastImageView] WARNING: you have initialized an SVGKImageView with a blank image (nil). Possibly because you're using Storyboards or NIBs which Apple won't allow us to decorate. Make sure you assign an SVGKImage to the .image property!