Idhatár
Idhatár is not a widely recognized term in Hungarian dictionaries or standard reference works. In practice, it rarely appears as a defined concept, and its usage is not established across reputable sources. The word appears to be a compound of határ, meaning border or limit, with id- whose exact function here is unclear. Because of this ambiguity, idhatár is most likely a typographical error for another term or a context-specific neologism rather than a general linguistic or technical concept.
If idhatár is encountered in a text, the most probable interpretation is that it is a misspelling
Because there is no authoritative, widely accepted definition for idhatár, readers should consult the original context
See also: időhatár (time limit); határ (border/limit); identitás/azonosítás related terms. If you have a particular source