ctagNametoLowerCase

ctagNametoLowerCase is a utility function used within the ctag software stack to convert a tag name to its lowercase form. It is commonly employed to normalize tag identifiers for case-insensitive comparisons, storage, and retrieval. By producing a canonical lowercase version, systems can treat 'Tag', 'tag', and 'TAG' as equivalent for matching purposes.

Syntax and behavior: The function accepts a single argument representing the tag name and returns a string containing the lowercase version. In most implementations, inputs are coerced to strings and transformed using a locale-insensitive lowercase operation, typically ASCII-focused to avoid locale-specific rules. Some variants may offer an optional locale parameter to apply locale-aware casing.

Examples: ctagNametoLowerCase('DIV') returns 'div'. ctagNametoLowerCase('Article-Tag') returns 'article-tag'. If the input is null or undefined in certain implementations, the function may return an empty string or throw a type error, depending on the design.

Rationale and usage: It is typically used before storing tag names in a database, constructing indices, or performing comparisons in templating or tagging systems where case should not affect matching. It is usually paired with a complementary function such as ctagName or a case-insensitive comparison utility to ensure consistent handling of tag identifiers across components.

See also: toLowerCase, string normalization, tag processing, ctag library.