Embedded Objects

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The parent container of an object is responsible for binding to the IFilter interface of a child object and managing the chunk IDs to keep them unique. Nested chunks appear to the original caller as chunks of the outer object. There is no operating-system support provided for this operation. IFilter interface implementations are responsible for binding to the IFilter interface of embedded objects. If the current chunk is within an embedded object, all calls to the IFilter::GetText and IFilter::GetValue methods should be passed directly to the IFilter interface of the embedded object, and the return values from the embedding should be returned to the client. Other calls require some additional work. The IFilter::GetChunk method, for example, may require that chunk IDs be renumbered to make them unique.