Dear all, I tried to reproduce the example of mkiv-publications.pdf,
chapter 10 through:

\definebtxdataset[document]
\usebtxdataset[document][test.bib]
\definebtxrendering[document]
\setupbtxrendering[document][numbering=yes]
\starttext
\starttext
As \cite[batty] already indicated, bibtex is a \LATEX||centric
program.
\completebtxrendering[document]
\stoptext

with test.bib as

@article{batty,
    author = 'M. Batty',
    title = 'The size, scale, and shape of cities',
    journal = 'Science',
    volume = '319',
    number = '5864',
    pages = '769--771',
    year = '2008'
}

Unfortunately, the result is two pages, one with As [<num:batty>] already
indicated, bibtex is a L A TEX--centric program. and the other with a large
1.

Could you tell me what I am doing wrong? My apologies if it is really
obvious...