Abstract: A method is provided for securing a shell assembly to a pipeline. A two part shell assembly (2, 3) is secured to pipeline (6) and holds in position an annular sealing arrangement (16, 17) located about a predetermined area of the outer surface of the pipeline. The sealing arrangement includes a containment ring (16) surrounding an annular seal (17). The containment ring is provided with connected through passages (16e) so that sealant can be introduced via a hole in the assembly into the passages to provide seating between the ring and the pipeline, and between the ring and the assembly. Thus, should the annular seal (17) fail during service the introduced sealant provides a seal.

Abstract: A method for constructing and maintaining a navigation tree based on external document classifiers is provided. In one embodiment, based on the returned category labels from the classifiers, a navigation tree is constructed by taking usability and user preferences into consideration. Control parameters and algorithms are provided for inserting into and deleting documents from the navigation tree, and for splitting and merging nodes of the navigation tree, are provided.

Abstract: A method for discovering association rules in a database that employs item constraints for extracting desired data relationships from a data base, thereby reducing the execution time of the rule discovery process and increasing the quality of the information returned. Such constraints allow users to specify the subset of rules in which the users are interested. Given a set of transactions D and constraints represented by a boolean expression .beta., the invention integrates the constraints into a selected rule discovery method rather than implementing the constraints as a post-processing step. The invention quickly discovers association rules that satisfy .beta. and have support and confidence levels greater than or equal to user-specified minimum support and minimum confidence levels, and may be implemented even when a taxonomy is present.

Abstract: The disclosed invention is a method for generating code in a maintainable form and in performing needed maintenance for the same. This method is useful in a computing system having at least one server and a multiplicity of clients coupled thereto by means of a network. The server includes a CPU executing legacy programs and at least one storage device for storing forms of the legacy program. The generated code implements the host forms while allowing for additional logic to be added. The method of this invention operates in at least one of the clients for generating code for modifying existing event routines for controls on the forms. Moreover, the code generated by the method of this invention is separated from additional logic added by a programmer, and this programmer-added logic is retained even as the generated code is revised.