Help:Item properties for developpers

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The information below shows information for developers and is not meant for users or content providers. It describes the way properties are defined, information for lay-out or maintenance is provided, and information about imports are kept.

Item propertie are properties that are part of an item, but not visible for users. You can recognise them on a red frame around the property.They support developers or content maintainers to define lay-out, to improve functionality or to keep track of what needs to be done.

In the property page, they should have a:

  • [Property visible] = “Logged in” statement (this makes them invisible for users).
  • [Property order] in the range of 9000 - 9099 (this puts them at the end of the page).

System properties

System properties work together with the inner working of the system.

  List of system properties Q10842


System characteristic (P131)

  • It works together with the code, it sorts various types of properties. Please, do not touch.

Level (P163)

  • Used to define a specific lay-out
  • It works together with the code, basically it sets up what kind of inverse function is to be used for the property. Please, do not touch.


Property order(P98)

  • defines the order the properties apear in a document


Part of value list (P118)

  • indicates this item is an expected value for a property.
  • the items are listed under the item where this field refers to
  • multiple values possible

Related property (P235)

  • indicates this item is an value list for a property. (this ensures that the property gets the right information)
  • (Use also Property expected value list (P119) on the property side.)


expected value list for Property (P119)

  • Displays which list of values should be used for the given property.
  • The actual values and these expected values are to be compared to detect erroneous values



property expected value txt (P52)

  • describes the type and format of the entry that is expected in words, for predefined lists, use property value list (P119)

Property visible (P97)

  • used to limit the visibility of a property for the public.

Inverse property label (P232)

  • reflects the opposite of the Label in an inverse relation

Status information properties

property usage instruction (P51)

  • To provide instructions to users.


Note (P42)

  • is used as qualifier or property to add (internal) notes about missing parts, things to do, etc.


Property note (P44)

  • is used to add (internal) notes about missing parts, things to do, etc.


Available item to be used (P14)

  • Shows that an item can be reused
  • Fill whatever

Status (P92)

  • Used to notify the maintainers there is issues or things to do
  • Possible values are in status value list Q607
  • You can add details in a Qualifier Note about the status
    • Used to make notes for yourself or for other contributors
    • Notes are invisible for the public


Inverse property (P58)

  • refers the opposite property in an inverse relation

List of inverse properties https://tinyurl.com/yustkwb5

properties to be reused

A list of properties that can be reused: Property to be reused (Q9502)

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