public Sequence eval(StaticContext context, DocumentSet docs, Sequence contextSequence,
public Sequence eval( DocumentSet docs, Sequence contextSequence,
	public Sequence eval(StaticContext context, DocumentSet docs, Sequence contextSequence,		Item contextItem)		throws XPathException {		if (contextItem != null)			contextSequence = contextItem.toSequence();		NumericValue value =			(NumericValue) getArgument(0)				.eval(context, docs, contextSequence, contextItem)				.convertTo(Type.NUMBER);		return new DoubleValue(Math.floor(value.getDouble()));	}