Help:Property pages

Help index

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Introduction

Property pages describe properties and contain additional information for functionality, service and maintenance, and import and export. The properties described below are "properties for properties". These will always have a • [Property order] in the range of 9300 - 9499.

Header

Label*

• The name of the property
• The title should be short but clear
• The label should be understandable in function of the datatype and/or the relation it describes

Description

• You can give a short (max 30 words) description of the property.

Also known as

• preferably we do not use aliases here, except for improving finding.
• Example all date properties could have an alias starting with date.

Data type*

• Defines the type of data that can be entered in the property
• Needs to be chosen when creating the property and can’t be changed.
• Possible values are described in List datatypes

Used properties

Inverse property label (P232)

• Should reflect the opposite of the Label, in other words, if a label describes a relation, the inverse property should describe the inverse relation.
• Only used when a property has data type = item
• Generates a label in the pages the item refers to.

Inverse property (P58) !avoid!

• It is preferable to use an inverse property label in stead of an inverse property. Only to be used when it is obvious that a relation can be described from both sides.
• Should reflect the opposite of the property, in other words, if a label describes a relation, the inverse property should describe the inverse relation.
• Only used when a property has data type = item
• Generates a label in the pages the item refers to.

Property order* (P98)

• A number that defines the order of presentation of the properties.
• Becomes active only after a reset of the system

Property visible (P97)

• Used to limit the visibility of a property for the public.
• Possible values are
  • Public
  • Logged in
• If the property is not available, we assume the property is public.

Property usage instruction (P51)

• Provides instructions to users on how to use the property

Property expected value (P52)

• Describes (in text) what values are expected.

Property expected value list (P119)

• Link to item that lists expected values
• For good functioning add also P135 to each item referred to
  • (Pro memori: Related property (P235))
  • Refers in an item that contains a value list to the property the values can be used for.
  • For good functioning this needs to be added to each item that is referred to by P119

Property note (P42)

• Provides notes or remarks on functioning to developers.

Wikidata property (P96)

• Refers to the equivalent Wikidata property
• If the relation is not exact, add a qualifier [context] to describe the relation.

Subproperty of (P57)

• Refers to a property that has a wider scope

@Jan Question: does it make sense to put all dates as a subclass of point in time, as they always have data type = point in time?roperty

Complementary property (P94)

• Refers to a property, that can be used together with this one to create for example timelines. (start-end dates.)

Property obligatory qualifier (P99)

• Qualifier that is needed for the proper functioning of a property

Relation (P122)

• class of properties that represent a relation between items.

@Jan: Question: does this property makes sense as it is always referring to property with data type = item

Formatter URL (P12)

• Use only for links to external databases or websites that use a unique identifier in a standardized URL.
• Defines the URL structure for external identifiers.

Property maintained by (P282)

• Refers to the person or organisation that is using or maintaining this property.
• Mostly used for service properties
• Do not change anything without discussion with maintainer.