Screen Scraping using the Application Function Server

‘Screen scraping’ can be used for implementing the Create, Change and Delete methods.

A Form Importer is available in the LN Studio to import the LN sessions as forms into the LN Studio. When the form is available, it can be used to implement a BID component. This approach is called ‘screen scraping’, because the business object data is not manipulated through the Data Access Layer, but through the session.

In LN, screen scraping is implemented through the function server, which offers a programming API on top of the LN user interface sessions. This means that for tables of type ‘form’, the LN Implementation Generator does not generate the normal (database-based) runtime, but a variant, which makes use of function server to ‘enter’ data, save it, etc.

If a business interface offers other methods than Create, Change, Delete, or if one or two of these methods must not be implemented through function server, the user must make use of an alternative business interface implementation (refer to Alternative Business Interface Implementations).