Among the item parameters, two are mandatory: title and description.
The field Identification is read-only. It is automatically assigned a value when the item record is stored in the database.
You might well leave the parameters, but the two mandatory parameters, unchanged.

Field name Purpose Constraints Example(s)
Title The title of the message. Might be compared to the title of an article in a journal. Mandatory.

Max. length: 64 characters*.

New: E-bike X20
Description The text of the message. Might be compared to the outline of an article in a journal.
Keep as brief and concise as possible. Remember: the message might be displayed in restricted space.
 
Mandatory.

*

Format tags are allowed here.

We have the brand new E-bike X20 on stock now.[nl]

[b]Better performance, longer lasting batteries, and just fine to drive![/b][nl]
You may test-drive it at our shop in Quistol.

Publication time (from) Publication start date and time of the message.
The field is assigned a default value if you clear it.
Optional.

Format: "yyyy-mm-dd hh:MM:ss".

Default: now.

 
Publication time (until) Publication end date and time of the message.
The field is assigned a default value if you clear it.
The message will automatically be removed from the database after this point in time.
Optional.

Format: "yyyy-mm-dd hh:MM:ss".

Default: Publication date / time (from) + Maximum age (from feed).

 
Valid / released Release flag. If this flag is not set the message is not published. Optional.

Set (publish), not set (do not publish).

 
Link If provided a link will be shown by the reader software.
What page to display when the user clicks this link.
Optional.

URL format.

Max. length: 255 characters*.

http://www.yourdomain.tld/news/e-bike_x20.html
Author The message author's name. Optional.

Max. length: 64 characters*.

NewsMaster
Source The source of the message if you are quoting it. Optional.

Max. length: 64 characters*.

Wikipedia
Source URL Link to a source web-page with more detailed information. Optional.

URL format.

Max. length: 255 characters*.

http://en.wikipedia.org/wiki/Zuse
  * field may contain variable references