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<article article-type="research-article" dtd-version="1.2" xml:lang="ru" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><front><journal-meta><journal-id journal-id-type="issn">2518-1092</journal-id><journal-title-group><journal-title>Research result. Information technologies</journal-title></journal-title-group><issn pub-type="epub">2518-1092</issn></journal-meta><article-meta><article-id pub-id-type="doi">10.18413/2518-1092-2026-11-1-0-6</article-id><article-id pub-id-type="publisher-id">4100</article-id><article-categories><subj-group subj-group-type="heading"><subject>ARTIFICIAL INTELLIGENCE AND DECISION MAKING</subject></subj-group></article-categories><title-group><article-title>&lt;strong&gt;CONSTRUCTING MULTI-DOMAIN KNOWLEDGE SYSTEMS BASED ON MULTI-LAYER KNOWLEDGE GRAPHS&lt;/strong&gt;</article-title><trans-title-group xml:lang="en"><trans-title>&lt;strong&gt;CONSTRUCTING MULTI-DOMAIN KNOWLEDGE SYSTEMS BASED ON MULTI-LAYER KNOWLEDGE GRAPHS&lt;/strong&gt;</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="ru"><surname>Pimeshkov</surname><given-names>Vadim Konstantinovich</given-names></name><name xml:lang="en"><surname>Pimeshkov</surname><given-names>Vadim Konstantinovich</given-names></name></name-alternatives><email>v.pimeshkov@ksc.ru</email></contrib></contrib-group><pub-date pub-type="epub"><year>2026</year></pub-date><volume>11</volume><issue>1</issue><fpage>0</fpage><lpage>0</lpage><self-uri content-type="pdf" xlink:href="/media/information/2026/1/НР.ИТ_11.1_6.pdf" /><abstract xml:lang="ru"><p>Knowledge systems enable the representation and application of structured information to solve a wide variety of problems. The development and application of modern knowledge systems inevitably encounter heterogeneous data, multiple stakeholders, or the support of multiple objectives. To address these challenges, the development of multidomain knowledge systems capable of coherently working with multiple domains within a single system becomes essential. This paper proposes the concept of multidomain knowledge systems, which describes knowledge systems operating in such conditions. Various examples of approaches to constructing knowledge systems that exhibit multidomain behavior in one way or another are considered. Topic modeling, in particular dynamic topic modeling, is considered as a basis for identifying layers in multilayer knowledge graphs. A multilayer dynamic knowledge graph (MDKG) concept is proposed, which uses a drifting dynamic topic model for layering, also allowing for tracking the emergence of new topics and the extinction of old ones. It is assumed that such a MDKG can be used to determine the relevance of text documents in the context of social media monitoring.</p></abstract><trans-abstract xml:lang="en"><p>Knowledge systems enable the representation and application of structured information to solve a wide variety of problems. The development and application of modern knowledge systems inevitably encounter heterogeneous data, multiple stakeholders, or the support of multiple objectives. To address these challenges, the development of multidomain knowledge systems capable of coherently working with multiple domains within a single system becomes essential. This paper proposes the concept of multidomain knowledge systems, which describes knowledge systems operating in such conditions. Various examples of approaches to constructing knowledge systems that exhibit multidomain behavior in one way or another are considered. Topic modeling, in particular dynamic topic modeling, is considered as a basis for identifying layers in multilayer knowledge graphs. A multilayer dynamic knowledge graph (MDKG) concept is proposed, which uses a drifting dynamic topic model for layering, also allowing for tracking the emergence of new topics and the extinction of old ones. It is assumed that such a MDKG can be used to determine the relevance of text documents in the context of social media monitoring.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>knowledge systems</kwd><kwd>knowledge graphs</kwd><kwd>social media</kwd><kwd>relevance</kwd></kwd-group><kwd-group xml:lang="en"><kwd>knowledge systems</kwd><kwd>knowledge graphs</kwd><kwd>social media</kwd><kwd>relevance</kwd></kwd-group></article-meta></front><back><ref-list><title>Список литературы</title><ref id="B1"><mixed-citation>Anton K. Topic modeling of natural language texts / K. Anton, G. 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