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+# URL Filter Support In Searches
+
+In some cases it is possible to bookmark search URLs with parameters in them in order to quickly re-access searches.
+
+The parameters that are accepted by CiviCRM has been changing across versions. However, we have been standardising our approach and the parameters documented here have been added in a 
+standardised manner and can be expected to work going forwards. Testing has been done on 5.20 & 5.21 but some of these parameters are available in earlier versions.
+
+To construct a parameterised url you need to 
+1) ensure the URL contains 'reset=1&force=1' (after the question mark)
+2) add additional supported parameters.
+
+So, for example, in 5.20 the following URL works on Drupal *(with Clean URL support)* to find contributions made by a person with a name like `Bob`, a contribution source like `dad` made on or before `01 Jan 2018`
+`civicrm/contribute/search?reset=1&reset=1&force=1&sort_name=bob&receive_date_high=20180101&contribution_source=dad`
+
+The following parameters work in a standardised way for contribution searches:
+
+|Field|Example|Comments|Min version (where known)|
+|-----|-------|-------|-------|
+|sort_name|sort_name=bob|Sort name is like `bob%` or `%bob%` depending on your site config \*|
+|contribution_source|contribution_source=dad|Contribution source like `%dad%` or 'dad%' \*|
+|cancel_reason|cancel_reason=dunno|Contribution source like `%dunno%` or `dunno%` \*|
+|invoice_number|invoice_number_reason=xyz|Invoice Number like `%xyz%` or `xyz%` \*|
+|contribution_page_id|contribution_page_id=1||5.21 [PR](https://github.com/civicrm/civicrm-core/pull/15785)|
+|receive_date_high|receive_date_high=20180101132323|Contribution received on or before 01 Jan 2018, 1.23 pm|
+|receive_date_low|receive_date_low=20161001|Contribution received on or after 01 Oct 2016|
+|receive_date_relative|receive_date_relative=this.year|Contribution received this year|
+|contribution_cancel_date_high|contribution_cancel_date_high=20180101132323|Contribution cancelled on or before 01 Jan 2018, 1.23 pm|
+|contribution_cancel_date_low|contribution_cancel_date_low=20161001|Contribution cancelled on or after 01 Oct 2016|
+|contribution_cancel_date_relative|contribution_cancel_date_relative=this.year|Contribution cancelled this year|
+|event_high|event_high=201901010000|Event end date on or before 1 January 2019|5.12 [PR](https://github.com/civicrm/civicrm-core/pull/15791)|
+|event_low|event_low=201901010000|Event Start date on or after 1 January 2019|5.12 [PR](https://github.com/civicrm/civicrm-core/pull/15791)|
+|event_relative|event_relative=this.year|Event Start Date on or after ths start of this year and the event end date on or before the end of the year|5.12 [PR](https://github.com/civicrm/civicrm-core/pull/15791)|
+|participant_registration_date_high|participant_registration_date_high=201901010000|Participant Registration Date on or before 1 January 2019|5.12 [PR](https://github.com/civicrm/civicrm-core/pull/15791)|
+|participant_registration_date_low|participant_registration_date_low=201901010000|Participant Registration date on or after 1 January 2019|5.12 [PR](https://github.com/civicrm/civicrm-core/pull/15791)|
+|participant_registration_date_relative|participant_registration__date_relative=this.year|Participant Registration Date on or after ths start of this year and the event end date on or before the end of the year|5.12 [PR](https://github.com/civicrm/civicrm-core/pull/15791)|
+|participant_status_id|participant_status_id=1,2|Participant Status in Registered and Pending Pay Later|5.12 [PR](https://github.com/civicrm/civicrm-core/pull/15791)|
+|participant_role_id|participant_role_id=1,2|Participant Role IN (Attendee, Host)|5.12 [PR](https://github.com/civicrm/civicrm-core/pull/15791)|
+
+
+* Whether text fields search for LIKE `%dad%` or LIKE `dad%` depends on the site wide setting
+'Automatic Wildcard' under **Administer CiviCRM -> Customize Data and Screens -> Search Preferences**
+ For large sites turning this off gives a significant performance improvement but it means
+that searching for 'dad' will return 'daddy' but not 'grandad'.
+
+## Date Formats
+
+In general there are two types of date formats to use
+
+1. \_high or \_low fields take an 8 or 14 digit number representing Year, Month, Day and optionally
+Hour, Minute and Second - eg. 20180921235959 means 21 September 2018 at 23 hours, 59 minutes and 59 seconds.
+You could leave off 235959 and it would mean at zero o'clock - ie midnight.
+
+2) Relative date fields. The available options are somewhat configurable by site but
+most sites should have the following
+
+| value | Means |
+| ---- | ---- |
+| current.month | Current calendar month to-date |
+| current.year | Current calendar year to-date |
+| current.quarter | Current quarter to-date |
+| current.week | Current week to-date |
+| previous\_before.day | Day prior to yesterday |
+| greater\_previous.month | From end of previous calendar month |
+| greater\_previous.year | From end of previous calendar year |
+| greater\_previous.quarter | From end of previous quarter |
+| greater\_previous.week | From end of previous week |
+| greater.month | From start of current calendar month |
+| greater.year | From start of current calendar year |
+| greater.day | From start of current day |
+| greater.quarter | From start of current quarter |
+| greater.week | From start of current week |
+| ending.year | Last 12 months including today |
+| ending\_2.year | Last 2 years including today |
+| ending\_3.year | Last 3 years including today |
+| ending\_30.day | Last 30 days including today |
+| ending\_60.day | Last 60 days including today |
+| ending.week | Last 7 days including today |
+| ending\_90.day | Last 90 days including today |
+| previous\_before.month | Month prior to previous calendar month |
+| starting.year | Next 12 months including today |
+| starting.month | Next 30 days including today |
+| starting\_2.month | Next 60 days including today |
+| starting.week | Next 7 days including today |
+| starting.quarter | Next 90 days including today |
+| next.month | Next calendar month |
+| next.year | Next calendar year |
+| next.fiscal\_year | Next fiscal year |
+| next.quarter | Next quarter |
+| next.week | Next week |
+| previous\_2.month | Previous 2 calendar months |
+| previous\_2.year | Previous 2 calendar years |
+| previous\_2.day | Previous 2 days |
+| previous\_2.quarter | Previous 2 quarters |
+| previous\_2.week | Previous 2 weeks |
+| previous.month | Previous calendar month |
+| previous.year | Previous calendar year |
+| previous.fiscal\_year | Previous fiscal year |
+| previous.quarter | Previous quarter |
+| previous.week | Previous week |
+| previous\_before.quarter | Quarter prior to previous quarter |
+| this.month | This calendar month |
+| this.year | This calendar year |
+| this.fiscal\_year | This fiscal year |
+| this.quarter | This quarter |
+| this.week | This week |
+| less.month | To end of current calendar month |
+| less.year | To end of current calendar year |
+| less.quarter | To end of current quarter |
+| less.week | To end of current week |
+| earlier.month | To end of previous calendar month |
+| earlier.year | To end of previous calendar year |
+| earlier.quarter | To end of previous quarter |
+| earlier.week | To end of previous week |
+| earlier.day | To end of yesterday |
+| this.day | Today |
+| starting.day | Tomorrow |
+| previous\_before.week | Week prior to previous week |
+| previous\_before.year | Year prior to previous calendar year |
+| previous.day | Yesterday |
diff --git a/mkdocs.yml b/mkdocs.yml
index 8c3b3a42fe..cd8d4f1378 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -42,6 +42,7 @@ pages:
 - The user interface:
     - 'Menu, dashboard and dashlets': 'the-user-interface/menu-dashboard-and-dashlets.md'
     - 'Searching': 'the-user-interface/searching.md'
+    - 'Search URL Filtering': 'the-user-interface/searching-url-support.md'
     - 'Undelete': 'the-user-interface/undelete.md'
 - Organising your data:
     - 'Overview': 'organising-your-data/overview.md'