Elaboration of particular Czech orthographical systems is different within diachronic section of Czech National Corpus. Texts written in so-called primitive or ligature orthography are modified in different way than texts written in so-called fraternal orthography for the needs of diachronic section of Czech National Corpus.
Irrespective of used orthographical system all texts are being transcribed. There is a set of symbols used in the transcription.
Those symbols distinguish individual texts, indicate its structure and conserve fundamental linguistic information.