hi,

The DiffGram is one of the two XML formats that you can use to render DataSet object contents to XML. The other format is the standard XML layout, which includes a root node that is named after the DataSet and that includes as child subtrees the names of the embedded tables. Each subtree represents one record in the given table. All this information is available through the DiffGram format, and much more, as well.

The key difference between the two XML formats lies in the ultimate goal for which they were designed. The ordinary XML serialization is mostly for persistence and local data storage, whereas the DiffGram format serves a slightly more ambitious purpose. The DiffGram is a format intended for network data exchange and .NET remoting.

You can persist a DataSet object with or without schema information, and the resultant XML file is a simple snapshot of the data being stored in the DataSet. In fact, only the current value of each row and column is persisted. Each row's state (added, modified, deleted) is lost, along with any error information associated with it.

__________________
Venkat
knowledge is Power