String strval; return new StringValue(getArgument(0).eval(context, docs, contextSequence).getStringValue());
if(getArgumentCount() == 1) contextSequence = getArgument(0).eval(docs, contextSequence); if(contextSequence.getLength() == 0) return StringValue.EMPTY_STRING; return contextSequence.convertTo(Type.STRING);
	public Sequence eval(StaticContext context, DocumentSet docs, Sequence contextSequence,		Item contextItem) throws XPathException {		if(contextItem != null)			contextSequence = contextItem.toSequence();		String strval;		return new StringValue(getArgument(0).eval(context, docs, contextSequence).getStringValue());	}