This is the 'Field' template. It is used by Forms for each field. It should be called in the following format:
{{Field
|name= 'free text' is translated to a standard input command
|cols=
|css class=
|default="username", "now", "pagename", "namespace" (reserved words) or other text
|delimiter=
|input type=category, categories, checkbox, checkboxes, date, datetime, datetime with timezone, listbox, radiobutton, text, textarea,
|type=category, categories, checkbox, checkboxes, date, datetime, datetime with timezone, listbox, radiobutton, text, textarea,
|size=
|rows=
|width=
|height=
|hidden=
|mandatory=
|property=
|restricted=
|top category=
|uploadable=
|default filename=Image for <page name>
|values=
|values category=
|values concept=
|list=true
|autocomplete on namespace=File
}}
Edit the page to see the template text.