To use ScalesXml you must use the following imports (where the objects ScalesUtils and ScalesXml import implicits).
import scales.utils._
import ScalesUtils._
import scales.xml._
import ScalesXml._
val prefixedNamespace = Namespace("uri:test").prefixed("pre")
val prefixedQName = prefixedNamespace("prefixed")
val elem = Elem(prefixedQName)
println("local name is "+localName(elem))
// Contains the document
val doc = loadXml(new FileReader("document.xml"))
// gets Path from the documents root
val path = top(doc)
// query for all nodes that match the XPath
path.\*("NoNamespace").\*(prefixedQName)