Parsing is of course much harder than writing.  I got the psych teminology wrong:  per <>, Joe English's definitions are:

In a borderline document (presumably a reference to Borderline Personality Disorder), more than one prefix maps to one namespace.

In a neurotic document, the same prefix is used for more than one namespace.

In a psychotic document, two different prefixes are declared for the same namespace in the same scope:

On Mon, Sep 9, 2019 at 9:31 AM Lassi Kortela <> wrote:
>>     Thanks for the specifics. Is there a proposal to have SXML built into
>>     R7RS-large?

> I'm not sure what that would mean; SRFIs normally describe procedures
> and syntax, not formats, except as an ancillary.  The MVP would be a
> procedure that wrote core SXML to an output port as XML, I think.

I thought there'd be read/write procedures and possibly a few map/filter
type functions. A basic SXML->XML writer is less than 150 lines of