  The development of bilingual dictionaries to medieval translations presents
diverse difficulties. These result from two types of philological
circumstances: a) the asymmetry between the source language and the target
language; and b) the varying available sources of both the original and
translated texts. In particular, the full critical edition of Tihova of
Constantine of Preslav's Uchitel'noe evangelie ('Didactic Gospel') gives a
relatively good idea of the Old Church Slavonic translation but not of its
Greek source text. This is due to the fact that Cramer's edition of the catenae
- used as the parallel text in it - is based on several codices whose text does
not fully coincide with the Slavonic. This leads to the addition of the
newly-discovered parallels from Byzantine manuscripts and John Chrysostom's
homilies. Our approach to these issues is a step-wise process with two main
goals: a) to facilitate the philological annotation of input data and b) to
consider the manifestations of the mentioned challenges, first, separately in
order to simplify their resolution, and, then, in their combination. We
demonstrate how we model various types of asymmetric translation correlates and
the variability resulting from the pluralism of sources. We also demonstrate
how all these constructions are being modelled and processed into the final
indices. Our approach is designed with generalisation in mind and is intended
to be applicable also for other translations from Greek into Old Church
Slavonic.
