absoluteURIn

absoluteURIn is a term used to describe a normalized, canonical form of an absolute URI produced through a defined normalization process. It is not a formal standard but a concept employed in some systems to ensure that identical resources map to a single, stable string. The idea contrasts with ordinary absolute URIs that may vary in case, encoding, or port usage across different clients and servers.

Normalization rules commonly associated with absoluteURIn include making the scheme and host lowercase, removing default ports, collapsing dot segments in the path, and normalizing percent-encodings. If the URI is derived from an internationalized form, a preceding conversion to an ASCII-compatible form may be applied before applying the canonical rules. In addition, unreserved characters may be decoded and then re-encoded as appropriate to achieve a consistent representation. The overarching goal is to enable reliable comparisons, caching, and deduplication.

Use and limitations: absoluteURIn is typically used in contexts where consistent addressing is important, such as resource registries, content delivery networks, or systems that perform strict URI comparisons. Because absoluteURIn is not defined by a central standards body, implementations may differ in exact rules or edge cases, and interoperability is not guaranteed. Designers using absoluteURIn should document the specific normalization steps their system applies and treat its output as a canonical form within that system.

See also: absolute URI, URI, URL, IRI, URI normalization, RFC 3986.

Example: an input like HTTP://Example.Com:80/a/./b/../c yields an absoluteURIn of http://example.com/c after applying scheme and host lowercasing, default port removal, and path normalization.