<interp> (interprétation) interprétation sous la forme d'une annotation concise, pouvant être
liée à un passage dans un texte [18.3 Spans and Interpretations]
Generally, each interp element carries an xml:id attribute. This permits the encoder to explicitly associate the interpretation represented
by the content of an interp with any textual element through its ana attribute.
Alternatively (or, in addition) an interp may carry an inst attribute that points to one or more textual elements to which the analysis represented
by the content of the interp applies.