Abstract: Textual elements and unambiguous locations paths corresponding to textual elements and/or their ancestors are extracted from a tree-structured document such as an XML document and stored in relational database structures. Textual elements are stored in a table comprising a column of textual elements and an identity column. The unambiguous location paths are stored in a second table in rows comprising the location path, the identity form the first table corresponding to the first textual element that is a descendant of the location path, the identity from the first table corresponding to the last textual element that is a descendant of the location path, and the name of the element located by the location path.

Abstract: Novel ultrathin unit layers and built-up multilayers of polymeric imine are obtained when a spreadable polyfunctional aldehyde or its precursor, particularly the alkyl Schiff base formed by its condensation with an alkyl amine, is spread on the surface of an aqueous subphase containing a diamine. The resulting polymeric imine unit layers can be transferred and built up on substrates which included quartz, aluminum and chrome-plated glass, and semiconductors.

Abstract: Unit layer polyheteroaromatic films of thickness less than 50 nm are obtained when an aldehyde monomer or aldehyde monomer precursor is spread onto an aqueous subphase containing an aromatic amine monomer, said aromatic amine monomer possessing amine or group VI heteroatom alcohols moieties in ortho (XH, NH.sub.2) pairs, where X is N or a group VI heteroatom. The resulting film can be transferred and built up as multilayer films on various substrates.

Abstract: Novel ultrathin unit layers and built-up multilayers are obtained when a spreadable polyfunctional aldehyde or its precursor, particularly the alkyl Schiff base formed by its condensation with an alkyl amine, is spread on the surface of an aqueous subphase containing a diamine. The resulting polymeric imine unit layers were transferred and built up on substrates which included quartz, aluminum and chrome-plated glass, and semiconductors.

Abstract: Novel ultrathin unit layers and built-up multilayers are obtained when a spreadable polyfunctional aldehyde or its precursor, particularly the alkyl Schiff base formed by its condensation with an alkyl amine, is spread on the surface of an aqueous subphase containing a diamine. The resulting polymeric imine unit layers were transferred and built up on subtrates which included quartz, aluminum and chrome-plated glass, and semiconductors.