abstract — A summary
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An abstract can occur in most components of DocBook. It is expected to contain some sort of summary of the content with which it is associated (by containment).
Formatted as a displayed block. Sometimes suppressed. Often presented in alternate outputs.
<article xmlns='http://docbook.org/ns/docbook'> <info> <title>Example abstract</title> <abstract> <para>In brief, … </para> </abstract> </info> <para>…</para> </article>