Help:Property page

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 behaviour 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.

Context information
Additional information is provided to a user on a property page since 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 actionsCiteRef::gh:smw:2135 in case the datatype of the property is altered.
 * In case the property is edit protectedCiteRef::gh:smw:2232 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 requirementsCiteRef::gh:smw:2227 are made more visible to help users identifying them and includes:
 * Detect a divergent datatype specification for an imported declaration.CiteRef::gh:smw:2281
 * Reserved property name

Add individual messages
Introductory messagesCiteRef::gh:smw:2221 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

Entity and value assignments
brought change to the display of pages and their annotated data values. In case the legacy display is desired just add the " " class to " ", i.e. " ".CiteRef::gh:smw:2785