Changes in the orthographic principles of the Hungarian language based on the last three spelling rules

Twelve editions of the publication entitled The Rules of Hungarian Orthography have been published so far. In each new edition there was an attempt to update the rules according to era and language use. 
The principles of Hungarian orthography had already appeared in the first stage of academic unification, as the edition entitled The Principles and Rules of Hungarian Orthography, published in 1877, containing the four principles of spelling: following pronunciation (writing in accordance with pronounciation), word analysis, traditional spelling and simplification. In this study, the spelling principles that form the basis of Hungarian orthography is compared with the three most recent regulations The Rules of Hungarian Orthography. 
In this study, the trends of Hungarian spelling principles have been surveyed from the regulations published in the first edition in 1832 to the present day. It has been presented how long the principles of Hungarian orthography have determined the rules of Hungarian orthography. These principles were present from the very beginning and guided the Hungarian orthography and its development. The changes were not significant, they only tried to bring closer the regulations to the language use adjusted to the language use of the given era. The principles of Hungarian orthography did not change radically at the beginning of the 20th century, despite the fact that relevant efforts were taken in the rules of Hungarian orthography. In the last three editions the principles have remained in their original forms, only minor changes have been taken.