From d77255421e05f8e1f090e89b17334aed0bdf4fe4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A1s=20Simonyi?= <andras.simonyi@gmail.com>
Date: Wed, 20 Jul 2022 23:54:32 +0200
Subject: [PATCH] * doc/org-manual.org: Document "PRINT_BIBLIOGRAPHY" options

---
 doc/org-manual.org | 56 +++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 55 insertions(+), 1 deletion(-)

diff --git a/doc/org-manual.org b/doc/org-manual.org
index 26d18f533..e45acc0f0 100644
--- a/doc/org-manual.org
+++ b/doc/org-manual.org
@@ -16810,11 +16810,65 @@ conformant to the Harvard style and the specification of the
 Wolkers-Kluwer publisher; since it relies on the ~bibtex~ processor of
 your LaTeX installation, it won't export to anything but PDF.
 
+** Bibliography printing 
+
 The =PRINT_BIBLIOGRAPHY= keyword specifies where the bibliography
-should print.
+should print (note the colon):
 
 : #+print_bibliography:
 
+A document may contain more than one =PRINT_BIBLIOGRAPHY= keywords,
+and the keyword can be used with or without additional options.
+Options can be used, for example, to print only entries that belong to
+a certain category or control formatting.  The set of supported
+=PRINT_BIBLIOGRAPHY= options and their interpretation varies between
+the different citation export processors, and several of them do not
+support passing options at all.
+
+*** Bibliography options
+
+The "biblatex" and "csl" export processors support bibliography
+options through a property list attached to the =PRINT_BIBLIOGRAPHY=
+keyword.  For example,
+
+: #+print_bibliography: :type book :keyword algebra
+
+Values including spaces must be surrounded with double quotes.  If you
+need to use a key multiple times, you can separate its values with
+commas, but without any space in-between:
+
+: #+print_bibliography: :keyword algebra,logic :title "Primary Sources"
+
+The "biblatex" export processor accepts all options supported by
+BibLaTeX's ~\printbibliography~ command, while the "csl" processor
+accepts the following ones:
+
+- =:keyword <keyword(,keyword2...)>= :: Print only entries whose
+  keyword field contains all given keywords.
+
+- =:notkeyword <keyword(,keyword2...)>= :: Print only entries whose
+  keyword field does not contain any of the given keywords.
+
+- =:type <entrytype>= :: Print only entries whose type is
+  =<entrytype>=.  Entry type is the BibTeX/BibLaTeX entry type if this
+  information is available (the entry was read from a BibTeX/BibLaTeX
+  bibliography) and the CSL entry type otherwise.
+
+- =:nottype <entrytype(,entrytype2...)>= :: Print only entries whose
+  type is not among the given entry types.  Entry type is determined
+  as in the case of =:type=.
+
+- =:csltype <entrytype>= :: Print only entries whose CSL entry type
+  (possibly based on a conversion from BibTeX/BibLaTeX to CSL) is
+  =<entrytype>=.
+
+- =:notcsltype <entrytype(,entrytype2...)>= :: Print only entries whose
+  CSL entry type (possibly based on a conversion from BibTeX/BibLaTeX
+  to CSL) is not among the listed entry types.
+
+- =:filter <predicate>= :: Print only entries for which the given
+  Emacs Lisp predicate returns a non-~nil~ value.
+
 * Working with Source Code
 :PROPERTIES:
 :DESCRIPTION: Export, evaluate, and tangle code blocks.
-- 
2.25.1