Parses and loads the source s, which can be a File, InputStream or String naming a URI. Returns a seq of tree of the xml/element struct-map, which has the keys :tag, :attrs, and :content. and accessor fns tag, attrs, and content. Other parsers can be supplied by passing startparse, a fn taking a source and a ContentHandler and returning a parser

Returns a zipper for xml elements (as from xml/parse), given a root element