mirror of
https://github.com/postgres/postgres.git
synced 2025-10-25 13:17:41 +03:00
e64aa1a39d
Improve the documentation of pg_stat_replication to explain when the backend_xmin column becomes NULL. This happens when a replication slot is used (the xmin is then shown in pg_replication_slots) or when hot_standby_feedback is disabled. Author: Renzo Dani <arons7@gmail.com> Reviewed-by: Fujii Masao <masao.fujii@gmail.com> Discussion: https://postgr.es/m/CA+XOKQAMXzskpdUmj2sg03_5fmiXc2Gs0r3TX1_rmcFcqh+=xQ@mail.gmail.com
<!-- doc/src/sgml/README.non-ASCII -->
Representation of non-ASCII characters
--------------------------------------
Find non-ASCII characters using:
grep --recursive --color='auto' -P '[\x80-\xFF]' .
Convert to HTML4 named entity (&) escapes
-----------------------------------------
We support several output formats:
* html (supports all Unicode characters)
* man (supports all Unicode characters)
* pdf (supports only Latin-1 characters)
* info
While some output formatting tools support all Unicode characters,
others only support Latin-1 characters. Specifically, the PDF rendering
engine can only display Latin-1 characters; non-Latin-1 Unicode
characters are displayed as "###".
Therefore, in the SGML files, we can only use Latin-1 characters. We
can use UTF8 representations of Latin-1 characters, or HTML entities of
Latin-1 characters, e.g., Álvaro.
Do not use UTF numeric character escapes (&#nnn;).
When building the PDF docs, problem characters will appear as warnings.
HTML entities
official: http://www.w3.org/TR/html4/sgml/entities.html
one page: http://www.zipcon.net/~swhite/docs/computers/browsers/entities_page.html
other lists: http://www.zipcon.net/~swhite/docs/computers/browsers/entities.html
http://www.zipcon.net/~swhite/docs/computers/browsers/entities_page.html
https://en.wikipedia.org/wiki/List_of_XML_and_HTML_character_entity_references