Abstract: Techniques for searching a hierarchical database and an unstructured database with a single search query are described herein. In one embodiment, a single search query is received that has syntax identifying an unstructured search string within a structured search query to automatically cause a search of the inverted index and use of the result to automatically search the hierarchical database. The unstructured search string is extracted from the single search query and an inverted index is searched according to the unstructured search string, wherein the inverted index includes virtual documents created from data stored in the hierarchical database, wherein each virtual document includes a unique identifier from the hierarchical database used to designate the data in the hierarchical database from which that virtual document was created, wherein a result of the inverted index search includes the unique identifiers of the virtual documents that meet the search.

Abstract: Memory efficient data processing is provided in a computer environment. A data representation or description is utilized to reduce memory footprint. A data structure can be serialized iteratively utilizing the representation rather than first loading the entire data structure to memory. Portions of the data structure can be materialized to and removed from memory as function of operational need.

Abstract: A data recording system 1 includes: a file generating part 3 for dividing digital data so as to generate a plurality of data files and recording the plurality of the data files sequentially into a recording medium 5; a management file judging part 6 for determining one management file for recording management information of the plurality of the data files; and a management information generating part 4 for recording the management information of the plurality of the data files into the determined management file. The management file judging part 6 determines the management file such that the number of the data files managed by the management file does not exceed a maximum data file number L (L is a natural number) that can be managed by the management file. Thereby, it is possible to record the plurality of the data files that are divided from the digital stream data and are recorded, such that the management of the plurality of the data files is easy.

Abstract: An information distribution system is provided with a plurality of information processing devices that are capable of communication with each other via a network, and that store shared information so that the information can be shared by the plurality of information processing devices. The shared information is shared information that has a public release time that is before the current time.