Patent attributes
A computerized CSD-system includes an instruments register in which the instruments have attributes which define them. The instruments are configured in a hierarchical multi-level structure. A first instrument on a first level in the hierarchy is linked to instruments on a second, lower level in the hierarchy. The link between instruments on the first and second levels of the hierarchy is defined by all of the attributes in the instruments on the second level also included in the instrument on the first level to which the instruments on the second level are linked. An amendment to an attribute in an instrument causes the same amendment in the same attribute of those instruments which are linked to the amended instrument and which are on lower levels in the hierarchy than the amended instrument. Each instrument is only allowed a link to one instrument above it.
