parse xml in pure bash

parse-xml.sh

#!/usr/bin/env bash

rdom () { local IFS=\> ; read -d \< E C ;}

while rdom; do # alternatively: while IFS=\> read -d \< E C; do
    case $E in
        tvshow|episodedetails)
            parent=${E} ;;
        title|showtitle|season|episode|plot|aired|thumb)
            echo ${parent}.${E}: ${C} ;;
    esac
done < "${1-/dev/stdin}" # reverse: < <(tac < "${1-/dev/stdin}")