s:2409:"Input to MediaWiki should be NFC-normalized UTF-8. MediaWiki may attempt to convert other input, but this may cause some operations (such as [[Special:ApiHelp/edit|edits]] with MD5 checks) to fail.

Some parameter types in API requests need further explanation:
;boolean
:Boolean parameters work like HTML checkboxes: if the parameter is specified, regardless of value, it is considered true. For a false value, omit the parameter entirely.
;timestamp
:Timestamps may be specified in several formats. ISO 8601 date and time is recommended. All times are in UTC, any included timezone is ignored.
:* ISO 8601 date and time, <kbd><var>2001</var>-<var>01</var>-<var>15</var>T<var>14</var>:<var>56</var>:<var>00</var>Z</kbd> (punctuation and <kbd>Z</kbd> are optional)
:* ISO 8601 date and time with (ignored) fractional seconds, <kbd><var>2001</var>-<var>01</var>-<var>15</var>T<var>14</var>:<var>56</var>:<var>00</var>.<var>00001</var>Z</kbd> (dashes, colons, and <kbd>Z</kbd> are optional)
:* MediaWiki format, <kbd><var>2001</var><var>01</var><var>15</var><var>14</var><var>56</var><var>00</var></kbd>
:* Generic numeric format, <kbd><var>2001</var>-<var>01</var>-<var>15</var> <var>14</var>:<var>56</var>:<var>00</var></kbd> (optional timezone of <kbd>GMT</kbd>, <kbd>+<var>##</var></kbd>, or <kbd>-<var>##</var></kbd> is ignored)
:* EXIF format, <kbd><var>2001</var>:<var>01</var>:<var>15</var> <var>14</var>:<var>56</var>:<var>00</var></kbd>
:*RFC 2822 format (timezone may be omitted), <kbd><var>Mon</var>, <var>15</var> <var>Jan</var> <var>2001</var> <var>14</var>:<var>56</var>:<var>00</var></kbd>
:* RFC 850 format (timezone may be omitted), <kbd><var>Monday</var>, <var>15</var>-<var>Jan</var>-<var>2001</var> <var>14</var>:<var>56</var>:<var>00</var></kbd>
:* C ctime format, <kbd><var>Mon</var> <var>Jan</var> <var>15</var> <var>14</var>:<var>56</var>:<var>00</var> <var>2001</var></kbd>
:* Seconds since 1970-01-01T00:00:00Z as a 1 to 13 digit integer (excluding <kbd>0</kbd>)
:* The string <kbd>now</kbd>
;alternative multiple-value separator
:Parameters that take multiple values are normally submitted with the values separated using the pipe character, e.g. <kbd>param=value1|value2</kbd> or <kbd>param=value1%7Cvalue2</kbd>. If a value must contain the pipe character, use U+001F (Unit Separator) as the separator ''and'' prefix the value with U+001F, e.g. <kbd>param=%1Fvalue1%1Fvalue2</kbd>.";