Abstract: A data handling device has access to a store of existing metadata pertaining to existing documents having associated metadata terms. It analyses the metadata to generate statistical data as to the co-occurrence of pairs of terms in the metadata of one and the same document. When a fresh document is received, it is analysed to assign to it a set of terms and determine for each a measure of their strength of association with the document. Then, for each term of the set, a score is generated that is a monotonically increasing function of (a) the strength of association with the document and of (b) the relative frequency of co-occurrence of that term and another term that occurs in the set; metadata for the fresh document are then selected as the subset of the terms in the set having the highest scores.

Abstract: A data handling device has access to a store of existing metadata pertaining to existing documents having associated metadata terms. It analyses the metadata to generate statistical data as to the co-occurrence of pairs of terms in the metadata of one and the same document. When a fresh document is received, it is analysed to assign to it a set of terms and determine for each a measure of their strength of association with the document. Then, for each term of the set, a score is generated that is a monotonically increasing function of (a) the strength of association with the document and of (b) the relative frequency of co-occurrence of that term and another term that occurs in the set; metadata for the fresh document are then selected as the subset of the terms in the set having the highest scores.

Abstract: An optical device package includes an optical device held in optically coupled relationship with an optical fibre by a ceramic ferrule. The optical device is mounted on a heatsink, the heatsink being mounted on the ferrule. The optical device is accurately mounted in relation to the rim of the ferrule such that insertion of the optical fibre into the ferrule brings the optical fibre into optically coupled relationship with the optical device without the need for active alignment techniques. The optical device, in use, is encapsulated in silicon sealant to seal the device form the effects of humidity.