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Standards compliance

neon is intended to be compliant with the IETF and W3C standards which it implements, with a few exceptions due to practical necessity or interoperability issues. These exceptions are documented in this section.

RFC 2518, HTTP Extensions for Distributed Authoring—WebDAV

neon is deliberately not compliant with section 23.4.2, and treats property names as a (namespace-URI, name) pair. This is generally considered to be correct behaviour by the WebDAV working group, and is likely to formally adopted in a future revision of the specification.

RFC 2616, Hypertext Transfer Protocol—HTTP/1.1

There is some confusion in this specification about the use of the identity transfer-coding. neon ignores the Transfer-Encoding response header if it contains only the (now deprecated) identity token, and will determine the response message length as if the header was not present. neon will give an error if a response includes a Transfer-Encoding header with a value other than identity or chunked.

RFC 2617, HTTP Authentication: Basic and Digest Access Authentication

neon is not strictly compliant with the quoting rules given in the grammar for the Authorization header. The grammar requires that the qop and algorithm parameters are not quoted, however one widely deployed server implementation (Microsoft® IIS 5) rejects the request if these parameters are not quoted. neon sends these parameters with quotes—this is not known to cause any problems with other server implementations.

Namespaces in XML

The neon XML parser interface will accept and parse without error some XML documents which are well-formed according to the XML specification but do not conform to the "Namespaces in XML" specification [REC-XML-names]. Specifically: the restrictions on the first character of the NCName rule are not all implemented; neon will allow any CombiningChar, Extender and some characters from the Digit class in this position.