Are the subdivisions \startfrontmatter etc. now obsolete?
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system          > tex > error on line 13 in file book.tex: 
Undefined control sequence ...

 3     \switchtotypeface [helvetica] [12pt,ss]
 4     \starttext
 5     \startfrontmatter
 6     \startstandardmakeup
 7     \midaligned{How to make a document.}
 8     \midaligned{by}
 9     \midaligned{The Author}
10     \stopstandardmakeup
11     \switchtotypeface [palatino] [12pt,rm]
12     \completecontent
13 >>  \stopfrontmatter
14     \startbodymatter
15     \input body.tex
16     \stopbodymatter
17     \startbackmatter
18     \completeindex
19     \stopbackmatter
20     \stoptext
---------------------------------------
-- 
John Culleton

"Death Wore Black" Police procedural: 
http://www.deathworeblack.com/

"Create Book Covers with Scribus"
http://booklocker.com/books/4055.html