Help:Property page

Property page
Information about a property and its characteristics
Collection
Loading... Shows message for non unique property label match (en) Property page displaying content in the (ja) user language (en) Enforced parent type inheritance for a subproperty (en) Shows a warning of the parent property to contain a different type annotation (on disabled enforcement) (en) Demonstrates the use of a value filter on the property page (en) Demonstrates the use of a value filter on the property page (en) Uniqueness violation in connection with configuration parameter $smwgFieldTypeFeatures (en) Conflicting property names caused by switching the capital links setting without the necessary data rebuild (en) Display of pages and their annotated data values on property pages with SMW 3.0.0 and later (en) Display of pages and their annotated data values on property pages earlier than SMW 3.0.0 (en) Property page displaying content in the (es) user language (en)
Keywords
property page · property declaration · property characteristics
Table of Contents

The property page contains the declaration of characteristics and constraints of a property and hereby its assigned values that need to adhere those restrictions to ensure a consistent behavior for those that use the same property instance.

Besides those declarative tasks, the property page can also show context information and it is recommended to pay attention to any warnings or errors to allow the system to work within the boundaries of the expected functionality.

Changing the characteristics of a property, such as the datatype etc. can be rather invasive and alters the behavior of the data stored. Moreover this triggers a lot of maintenance tasks which take some time to get done. Also note that the more a property is used the longer this will take. Therefore it is recommended to not allow editing property pages by inexperienced users, e.g. anonymous or occasional users to prevent unexpected, unnecessary and consequently unwanted changes from happening.

Context information

Additional information is provided to a user on a property page since Semantic MediaWiki 2.5.0Released on 14 March 2017 and compatible with MW 1.23.0 - 1.29.x. to clarify restrictions and constraints of that property in context of the specification made and may include:

• A fixed property informs a user about necessary requirements and actions1 in case the datatype of the property is altered.
• In case the property is edit protected2 then a warning message (yellow) is displayed on the property page informing accordingly.
• Some property specifications require additional information with violations to them often being non-intuitive. Some codified requirements3 are made more visible to help users identifying them and includes:
  • Detect a divergent datatype specification for an imported declaration.4
  • Reserved property name

Add individual messages

Introductory messages5 editable in the "MediaWiki" namespace that can be shown on each property page and is maintained with the help of:

• system message "smw-property-introductory-message" - displayed for all properties
• system message "smw-property-introductory-message-user" - displayed for all user-defined properties
• system message "smw-property-introductory-message-special" - displayed for all special properties

The appearance of the info boxes may be adapted to the respective wikis style guideline via CSS by manipulating the class assigned to these respective system messages.

Lists

Entity and value assignments

Semantic MediaWiki 3.0.0Released on 11 October 2018 and compatible with MW 1.27.0 - 1.31.x. brought change to the display of pages and their annotated data values. In case the legacy display is desired just add the "legacy" class to "smw-property-page-results", i.e. "smw-property-page-results legacy".6

See also

• Help page on properties and types
• Help page on property declaration
• Help page on property usage count
• Help page on data value filtering on property pages
• Help page on fixed properties
• Help page on property similarity
• Help page on importing vocabulary definitions
• Help page on "Concept" pages
• Help page on user messages
• Help page on configuration parameter $smwgChangePropagationProtectionSets whether property pages are protected from editing while a property change propagation is being processed