The basic part of the search documentation consists of a collection of patent documents systematically accessible in a manner suitable for searching. Additionally, periodicals and other publications of technical literature are put at the disposal of the search division. This non-patent literature is accessible through in-house or external databases, some of which are arranged in the library in a manner suitable for consultation; parts thereof, such as particularly relevant articles, are selected and made available for direct access by incorporating these, or copies thereof, into the systematic documentation. The systematically accessible part of the search documentation includes the minimum documentation required for an International Searching Authority under Rules 34 PCT and Rule 36.1(ii) PCT and extends somewhat beyond these minimum requirements.