Ditto parameters and placeholders

This is as full a list as I can find of parameters and placeholder for Ditto 2.1 and standard extensions to it. Much has been culled from the official ditto.modxcms.com site. The order is somewhat ad hoc, and is more or less in the sequence "set up Ditto, set up the retrieval, set up the retrieved list, format the display", with some of the less vital templates and less used features towards the bottom.

General placeholders

[+author+]
Purpose:
First available of createdby->fullname, createdby->username, admin username of retrieved document
[+title+]
Purpose:
pagetitle field of retrieved document
[+url+]
Purpose:
link to retrieved document
[+ditto_iteration+]
Purpose:
sequence number of retrieved document within current page
Notes:
Starts from zero
[+ditto_sort +]
Purpose:
sequence number of retrieved document within complete retrieved set
Notes:
Not officially documented, spotted in Debug screen and it just works. Starts from zero

Placeholders for pagination

[+next+]
Purpose:
link to next page of result
Notes:
Empty if &paginate <> 1
[+previous+]
Purpose:
link to previous page of result
Notes:
Empty if &paginate <> 1
[+splitter+]
Purpose:
filled with &paginateSplitterCharacter when [+previous+] and [+next+] are both active
Notes:
Empty if &paginate <> 1
[+start+]
Purpose:
sequence number within complete set of first displayed document on page
Notes:
Empty if &paginate <> 1
[+urlStart+]
Purpose:
number of current page as seen in URL query string (?start=[+urlStart+])
Notes:
Empty if &paginate <> 1
[+stop+]
Purpose:
sequence number within complete set of last displayed document on page
Notes:
Empty if &paginate <> 1
[+total+]
Purpose:
total number of retrieved documents
Notes:
Empty if &paginate <> 1
[+pages+]
Purpose:
page-number links to all the other pages, inactive display of current page number
Notes:
Empty if &paginate <> 1
[+currentPage +]
Purpose:
number of current page
Notes:
Empty if &paginate <> 1
[+perPage+]
Purpose:
displayed items per page (equal to <strong>&display</strong>)
Notes:
Empty if &paginate <> 1
[+totalPages+]
Purpose:
total number of pages in result
Notes:
Empty if &paginate <> 1
[+ditto_pagination_set+]
Purpose:
1 if &paginate is set
Notes:
Empty if &paginate <> 1

Placeholders for summary

[+summary+]
Purpose:
Content of introtext field, if not blank, or truncated text
[+link+]
Purpose:
Link to full item
Notes:
Link text set by &trunctText or default from language file

Placeholders for tagging

[+tagLinks+]
Purpose:
list of tags associated with document, separated by &tagDelimiter
Notes:
Hyperlinks to filtered view for each tag in &tagDocumentID (or current document)
[+tags+]
Purpose:
In page containing result: tags used to filter in the displayed documents
Notes:
Reflects &tags parameter or tags supplied in URL

Placeholders for dateFilter

[+year+]
Purpose:
selected year in filter
Notes:
Two or four-digit value as supplied
[+month+]
Purpose:
selected month in filter
Notes:
Numerical month
[+day+]
Purpose:
selected day in filter
Notes:
Numerical day