Hi Minhui, ManifoldCF is not designed to somehow know about external changes you have made to an index outside of ManifoldCF. It updates entire documents, using delete/insert. If you want to manage other fields, I suggest that the best way to do it is to write a transformation connector that adds the "comment" and "bookmark" fields directly to a given RepositoryDocument *before* it is sent to Solr, and let MCF manage the entire incremental indexing process.
Thanks, Karl
