A metacharacter is a character that has a special meaning to a computer program, such as a shell interpreter or a regular expression (regex) engine. For instance, in XML, the character is interpreted not as ordinary text (in which it would be the less-than sign), but rather as a metacharacter signalling the beginning of an XML tag.
A metacharacter is a character that has a special meaning to a computer program, such as a shell interpreter or a regular expression (regex) engine. For instance, in XML, the character is interpreted not as ordinary text (in which it would be the less-than sign), but rather as a metacharacter signalling the beginning of an XML tag.
==In POSIX extended regular expressions==
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).