The handling of XML name spaces in the Go standard library encoding/xml is incomplete, and has a number of quirks and limitations which makes it impossible to generate namespaces and namespace prefixes in the standard way we see in many places including XML schemas and DASH MPDs.

There are a number of pull requests to improve the situation, and in particular PR #48641 - encoding/xml: support xmlns prefixes includes an extension to the XML struct tags that make it possible to specify name space prefixes.

This package is a copy of PR#48641. More specifically, commit a79fce7705e3102ca642bb981bb3829b3fa0824f from the branch xmlns-fixes in ydnar/go, which is rebased on Go master as of 2024-10-28.

Hopefully, this code will be merged into the Go standard library at some point.

Escaping tab and newline in CharData byte content led to problems with some DASHSchema test content, so this is disabled: EscapeText passes escapeNewline=false, and the '\t' case is removed from escapeText. Tab and newline are still escaped in (*printer).EscapeString, which is used for attribute values.