A number of problems related to the construction of the metadata factory of the digital mathematical library Lobachevskii-DML have been solved. By metadata factory we mean a system of interconnected software tools aimed at creating, processing, storing and managing metadata of digital library objects and allowing integrating created electronic collections into aggregating digital scientific libraries. In order to select the optimal such software tools from existing ones and their modernization:we discussed the features of the presentation of the metadata of documents of various electronic collections related both to the formats used and to changes in the composition and completeness of the set of metadata throughout the entire publication of the corresponding scientific journal;we presented and characterized software tools for managing scientific content and methods for organizing automated integration of repositories of mathematical documents with other information systems;we discussed such an important function of the digital library metadata factory as the normalization of metadata in accordance with the formats of other aggregating libraries.As a result of the development of the metadata factory of the digital mathematical library Lobachevskii-DML, we proposed a system of services for the automated generation of metadata for electronic mathematical collections; we have developed an xml metadata presentation language based on the Journal Archiving and Interchange Tag Suite (NISO JATS); we have created software tools for normalizing metadata of electronic collections of scientific documents in formats developed by international organizations – aggregators of resources in mathematics and Computer Science; we have developed an algorithm for converting metadata to oai_dc format and generating the archive structure for import into DSpace digital storage; we have proposed and implemented methods for integrating electronic mathematical collections of Kazan University into domestic and foreign digital mathematical libraries.

1 Институт математики и механики им. Н.И. Лобачевского 2 Высшая школа информационных технологий и интеллектуальных систем Казанского (Приволжского) федерального университета Аннотация. Представлены решения ряда задач управления метаданными, возникающих при построении цифровых математических библиотек. Описаны структура фабрики метаданных цифровой математической библиотеки Lobachevskii-DML и набор сервисов, составляющих основу этой фабрики. Представлены те базовые сервисы фабрики метаданных цифровой математической библиотеки Lobachevskii-DML, которые удается применить к архивным математическим коллекциям. Дано описание сформированных архивных математических коллекций, указаны особенности метаданных их документов.

The solutions of the main problems associated with the formation of digital mathematical collections from documents published in the pre-digital period are presented – such collections are designated in the work as retro collections. Algorithms for creating a meta description of retro collections based on the analysis of the structure of mathematical documents and the use of software tools for extracting metadata are given. The description of retro-collections formed using the developed algorithms and included in the metadata factory of the digital mathematical library Lobachevskii-DML is given. The schemes for the formation of metadata and methods for normalizing the extracted metadata in accordance with the schemes and requirements of the integrating mathematical libraries are indicated.

A method of forming a mandatory set of metadata for retro collections of a digital mathematical library is presented. The open resources of the Semantic Network were used as a source for completing metadata. With the help of the software tools of the metadata factory of the digital mathematical library Lobachevskii-DML, the main processes of text analysis of documents of digital retro collections are performed, in particular, the selection of named entities. Further, through the system of queries in the semantic network, the search and selection of information objects is carried out. After performing automatic filtering and normalization, the obtained information is included in the metadata set. As one of the results, the process of forming a mandatory set of metadata for one of the collections of the digital library Lobachevskii-DML – a retro-collection of articles of the journal "Izvestia of the Physics and Mathematics Society at Kazan University" is presented.