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Special property "Has improper value for"
|Has improper value for|
Alerts in case the assigned value to a property is invalid
|Provided by:||extension "Semantic MediaWiki "Semantic MediaWiki (SMW) is a free, open-source extension to MediaWiki that lets you store and query data within the wiki's pages. Semantic MediaWiki is also a full-fledged framework, in conjunction with many spinoff extensions, that can turn a wiki into a powerful and flexible knowledge management system. All data created within SMW can easily be published via the Semantic Web, allowing other systems to use this data seamlessly.|
|Removed:||still in use|
|Alias:||has no alias|
|In this wiki:||Property:Has improper value for|
|Table of Contents|
The Has improper value for property is a special property in Semantic MediaWiki (SMW) with a built-in meaning: it helps to keep track of input errors in a wiki when values that are assigned to some property are invalid. These checks are made in accordance with datatype assigned to the property with the special property "Has type"Assigns a datatype to a property.
The property connects a page where some invalid input was given to the property to which this value was assigned. Thus, it can also be used in inline queries or on special page "SearchByProperty"Allows to search the wiki by properties or property value combinations to find all pages where an error occurred for a particular property. Also note that even errors that appeared when using some special property are recorded. As a simple example, we provide some erroneous input on this page:
Trying to assign "not a date" as value to property "News date" which requires a valid date:
Not a date"Not a date" contains an extrinsic dash or other characters that are invalid for a date interpretation. The little warning icon alerts you of this improper value.
Has improper value for can be used for wiki gardening and maintenance, and it is also employed by Semantic MediaWiki for automatically repairing its records after the datatype of some property was changed.
This special property should never be set manually, since Semantic MediaWiki will take care of setting its value. Starting with Semantic MediaWiki 2.2.0Released on 9 May 2015 and compatible with MW 1.19.0 - 1.24.x. it is no longer possible to manually add values for this special property.1
Semantic MediaWiki 2.2.0Released on 9 May 2015 and compatible with MW 1.19.0 - 1.24.x. also introduced the "errorcount" parameter to the API-module "smwinfo"Allows to access statistical data and information about the usage of Semantic MediaWiki allowing to retrieve the number of improperly added values as well as showing them explicitly in a separate line in the "Semantic Statistics" section of the "Statistics" special page.2 Thus this creates better awareness of issues related to storing property values and helps in gardening wiki annotations.
See the property page Has improper value for to see which pages use this special property on this wiki.
- Semantic Statistics on special page "Statistics" - improper annotations
- Help page on special property "Has processing error"Holds a "container" with further information about a problem and allows to explore it.
- Help page on special property "Has processing error text"Contains a textual description of an error which occurred during the processing of a page.
- Help page on special page "ProcessingErrorList"Lists errors that occurred in connection with Semantic MediaWiki
- Help page on processing errors
- Help page on semantic gardening