}}
== Basics ==
Id marker scan queries are used for fetching a list of [[Contentclass|ContentClasses]] identified by different scan codes ([http://dev.metaio.com/sdk/tracking-config/optical-tracking/id-marker/ ID Marker], [http://en.wikipedia.org/wiki/Barcode Barcode], [http://en.wikipedia.org/wiki/QRcode QR Code]) from the database. All of these objects have to fullfill the classification [[SYSCLS_OBJECTWITHIDMARKER]] in order to be found as the query result. The id marker scan query itself inherits functionality from [[Query|Query]] and has the classification interface [[SYSCLS_IDMARKERSCANQUERY]].
Id marker scan queries can be used in different scenarios with objects identified by scan codes:
* data fetching (n records)