You can use this macro to open and close (html) spans
For the content contained in the span you can:
apply a css class (css_class param sets class attr)
give it a id (id param/attr)
set its language (lang param/attr)
set its writing direction (dir param/attr)
By definition, a span works only within ONE block, so if you need something for multiple blocks (e.g. multiple paragraphs), you have to open/close it in each block. See the div macro for spanning multiple blocks.
For details about the span html element, see the span specification on w3.org.
-- JimWight 2011-04-19