## PageBeanComponentControl

Page bean components controls are a special variant of page bean components.

(Normal) page bean components can be configured by attributes. At runtime the attribute values are passed into the component processing, so that the component can adapt its behavior accordingly.

Page bean component controls can not only obtain attribute data - they also can set attribute values: this means that if an attribute is bound via expression then the page bean component control can not only read the expression but also update the expression.