Representing Parkosz's alphabet in the Junicode font

The 15th century Latin manuscript containing a treatise by Jakub Parkosz was the very first proposal of Polish spelling. To account for all the phonemes of Polish some new letters were proposed, which are not available in present day fonts. This makes it difficult to quote the proposal when discussing the history of Polish spelling. A transliteration was designed which uses only the characters available in the Unicode standard, but it was rather cumbersome. Another approach, suggested by the present author and implemented by Peter S. Baker in his Junicode (version two) font, is to use so-called tag characters.