Patent ID: 8688695

Claim:
A computerized searchable repository for documents, each document having a structured metadata part and one or more unstructured content parts, comprising: a storage device to store the documents, a full text index and a linking structure, the content parts of the documents being stored in a single-instanced manner to avoid storing duplication of identical content parts, the full text index being usable for keyword searching of the documents and including a metadata index and a content index of the metadata and content parts respectively of the documents, the linking structure including metadata-to-content links and content-to-metadata linking entries, each metadata-to-content link linking a metadata part of a respective document to each content part of the document, each content-to-metadata linking entry having one or more content-to-metadata links collectively linking a respective content part to the metadata parts of a group of documents that each include the content part; and a processor to perform full text indexing of the documents in the storage device, the full text indexing of each document including metadata indexing a metadata part, conditionally content indexing a content part, and updating the linking structure, the content indexing being performed only if the content part is a new content part not matching any of at least a set of content parts already stored in a content store and indexed in the content index, each of the metadata indexing and content indexing including generating new index entries in the metadata or content index respectively for the metadata or content part respectively, each index entry associating a respective key word or key value with a corresponding one or more metadata or content parts containing the key word or key value, and the updating of the linking structure including generating new metadata-to-content and content-to-metadata links between the metadata part and either the new content part or an existing matching content part if present.