It specifies the package to load.
It is used with the package attribute to specify whether the package should be loaded as part of the zk package. If not specified, each package will be loaded separatedly. This speeds up the loading if we merge several packages into one.
Since ZK 6, it is allowed to specify the target package in the merge attribute. For example,
For more information, please refer to the Performance Tips section.
|6.0.0||September 2011||The merge attribute could be specified with the package's name to merge to, such as zul.lang.|