XMLIndexer. The XMLIndexer Service is a generic indexer of XML data homogeneous collections. The service allows creating, populating and resolving queries against such collections. Two types of XMLIndexer have been designed, each of them manages a collection of XML documents: • WSDaix – a WSDaix is completely unconscious of the collection and the data handled. This means that it does not impose any constraint about them and, therefore, it assumes that the clients know the schema of the documents to query. It can be used each time it is useful to index and query a (temporary) set of XML data, like a result set; • GCUBEDaix – a GCUBEDaix is bound to a specific Metadata Collection and it is used to index the elements of such a collection. When a new Metadata Collection to be indexed is created, the Metadata Manager Service creates also a new related GCUBEDaix and, each time a new Metadata Object is added/updated in such collection, the Metadata Manager Service also adds/updates the GCUBEDaix by feeding it with the new element.
