Walter De Gruyter publishes a wide variety of content covering humanities, medicine, the sciences and law. The "De Gruyter Online" platform provides access to title information and the electronic content for De Gruyter journals and books under one roof. Users from the MPG have access to following products: * De Gruyter Journals and Yearbooks - current content of selected serial titles available on the platform (last 13 volumes) * De Gruyter Journal Archive - backfile content of 150 titles * De Gruyter Online / Research Now E-Journal - about 50 journals focusing on research in economics, formerly published by Berkeley Electronic Press * De Gruyter eBooks - a collection of purchased e-books which is continuously extended by single e-book acquisitions by MPG libraries

DEPATISnet is a service provided to you by the German Patent and Trade Mark Office. You can conduct online searches in patent publications from around the world stored in the database of DEPATIS, the in-house patent information system of the GPTO.

The Deposit Once of the Technische Universität Berlin makes qualified scientific text documents and research data of members of the TU Berlin available online. The repository is committed to the principles of Open Access and includes parallel publications from peer-reviewed publishers (post-prints) as well as dissertations, monographs, conference proceedings, collections and other scientific treatises.

Derwent Innovations Index (DII) is a comprehensive database of international patent information, merging records from the Derwent World Patents Index® with patent citation information from the Derwent Patents Citation Index® (Derwent PCI). The index provides web access to over 14 million basic inventions and more than 20 million patents, with coverage dating back to 1963 in some technology areas. The database gives users a comprehensive overview of inventions in the global marketplace in three categories: Chemical, Engineering, and Electrical & Electronic. The bibliographic records are enriched by citation data from Derwent PCI appearing in patents from 6 major patenting authorities. Derwent DCI provides details of citations, both patent and literature, reviewed by the examiner during the examination of a patent application. Prior to May 1997, examiner and author citations were provided for 16 patent-issuing authorities. The database also contains a backfile with patent records dating back to the 1970's. Every week approximately 25,000 patent documents from more than 47 patent-issuing authorities are reviewed and value enhanced by Derwent's patent experts. In addition, every week new cited and citing references are added for approximately 45,000 records from the six major patent-issuing authorities. The resource also includes Derwent Chemical Reactions (DCR), a unique database of searchable chemical structures and other substance-based information. It is used to search for specific compounds that are indexed in Derwent World Patents Index records.

The numerical database DETHERM provides thermophysical property data, which are indispensable for construction and design of chemical apparatus, plants and processes. DETHERM contains literature values, together with bibliographical information, descriptors and abstracts. The following properties for pure compounds and for mixtures are stored: 1) phase equilibrium data, 2) vapor pressures and critical data, 3) thermodynamic properties, 4) transport properties, 5) surface tensions, 6) electrolyte data.

The catalog comprises the holdings of the locations Leipzig since 1913, Frankfurt am Main since 1945, the holdings of the Deutsches Musikarchiv since 1976, and archival papers of the Deutsches Exilarchiv 1933-1945 since 2005. The catalog covers monographs, journals, maps and atlases, music and sound storage media, and dissertations published in Germany since 1913 (in print or electronically), in addition, translations from German into other languages and foreign-language works related to Germanic culture (since 1941). -- Der Katalog umfasst die Bestände der Standorte Leipzig seit 1913, Frankfurt am Main seit 1945, die Bestände des Deutschen Musikarchivs seit 1976 und die Archivalien des Deutschen Exilarchivs 1933-1945 seit 2005. Der Katalog beinhaltet in Deutschland seit 1913 erschienene Monografien, Zeitschriften, Karten und Atlanten, Musikalien und Tonträger, Dissertationen und Habilitationsschriften in gedruckter oder elektronischer Form, außerdem Übersetzungen aus dem Deutschen in andere Sprachen und fremdsprachige Germanica (seit 1941).

The online edition of Dictionary of German Biography (DBE) provides information about people from all aspects of public life: men and women from the entire German-speaking area, from the time of the very earliest written records right up to the present. The biographies inform the reader about a person's origins, education, influential encounters, professional development, places of influence, significant works and achievements, friendships and relationships, membership of groups and associations, reception and, in special cases, prizes and honours. To be able to evaluate the life and work of a person in its completeness, DBE only contains people who are already dead. Dictionary of German Biography Online contains all articles from the second book edition of DBE.

Beinhaltet das Vokabular von 230 lateinischen Prosaautoren, die zwischen 1300 und 1600 tätig waren, Übersetzungen in englisch und Französisch

Digi20 concentrates on the digitalization of monographs published in the second half of the 20th century, predominantly in the field of humanities and social sciences. In the first phase of the project, approx. 4,700 titles of programme segments of the publishers Vandenhoeck & Ruprecht, Wilhelm Fink / Ferdinand Schöningh as well as Otto Sagner were digitized. In a second phase, further approx. 1,750 titles are being included till 2014 by consecutively digitizing all monographs up to a defined ‘Moving Wall’ of three to five years to the current year of publication.

Since its foundation in 1964 the Max Planck Institute for European Legal History has been intensively engaged in research into the history of private law in Europe. It therefore has a particularly rich store of literary sources on 19th century German, Austrian and Swiss private and civil procedural law. With support from the German Research Foundation (DFG) it has been possible to digitize this exceptional concentration of material and make it available to a wider scientific audience. In the course of the project, which extended from 1997 until 2002, some 4,316 volumes were digitized comprising around 1,350,000 pages. For the Institute library this venture into digitization represents a continuation of its long-standing initiative to maintain and conserve its collections.

The current release features the English translation of Barth's magnum opus, The Church Dogmatics, in its entirety. The original German version, Die kirchliche Dogmatik, is also included as are the first 36 volumes of Barth's Gesamtausgabe, which includes hundreds of letters, sermons, lectures, conversations, and academic writings. These volumes are supplemented by seven additional German works that have not yet been published as part of the Gesamtausgabe and English translations of of thirteen important texts by Barth.

The Digital Library of the Commons (DLC) is a gateway to the international literature on the commons. The DLC provides free and open access to full-text articles, papers, and dissertations. This site contains an author-submission portal; an Image Database; the Comprehensive Bibliography of the Commons; a Keyword Thesaurus, and links to relevant reference sources on the study of the commons.

The Digital National Security Archive of the U.S.A. is a comprehensive collection of essential primary documents concerning the U.S. foreign and military policy since 1945. The database, consisting of 33 partial collections, contains more than 80,000 of the most important declassified documents. Thereby, it is about political scripts such as directives of the President, notes, and diplomatic dispatches. It is also about meeting notes, autonomous reports, briefings, communications from the White House, e-mails, confidential letters, and other secret documents. For each partial collection there is included additionally an explanatory reference part containing an introduction, a chronology, a glossary, and a bibliography. This reference part helps one to bring the material also into contextual coherencies. -- Das Digital National Security Archive der U.S.A. ist eine umfangreiche Sammlung wesentlicher Primärdokumente zur US-Außen- und Militärpolitik seit 1945. Die aus 33 Teilsammlungen bestehende Datenbank enthält über 80.000 der wichtigsten freigegebenen Dokumente. Es handelt sich dabei sowohl um politische Schriften wie Direktiven des Präsidenten, Memos, diplomatische Depeschen als auch um Sitzungsnotizen, unabhängige Berichte, Briefings, Mitteilungen aus dem Weißen Haus, Emails, vertrauliche Briefe und andere geheime Dokumente. Zu jeder Teilsammlung ist zusätzlich ein erklärender Referenzteil mit Einführung, Chronologie, Glossar und Bibliographie enthalten, der hilft, das Material auch in kontextuelle Zusammenhänge bringen.

DigiZeitschriften is a digital library containing digitized back issues of core German research journals. At the moment the platform provides full-text access to more than 600 journals dating back to 1850. The archive content is edited on an ongoing basis. Any existing gaps will be filled and missing data steadily added. Users from the MPG have access to the complete journal collection, older public domain content is available free of charge to anyone.

The trilingual termbase DIN-TERM provides translations for German, French or English standardized terms. The database contains concepts from valid and withdrawn standards, draft standards and specifications.

The primary aim of DOAB is to increase discoverability of Open Access books. Academic publishers are invited to provide metadata of their Open Access books to DOAB. An overview of participating publisher can be found here.

The DOAJ service lists toll-free, quality controlled, scientific and scholarly journals. It generally aims at covering all subjects and languages. The DOAJ Articles Search is restricted to those journals the publisher has supplied article metadata for.

ProQuest Dissertations and Theses Global is the world's most comprehensive collection of dissertations and theses, covering materials back to the first U.S. dissertation, accepted in 1861, as well as to European dissertations from the 17th century. The database is the official dissertations repository for the Library of Congress, with 4 million bibliographic citations, 2 million full texts, 3000 contributing Institutions worldwide and 130,000 works added annually.

The Komintern segment of the portal contains a complete reference of the inventory of the COMINTERN Archives, and a full text archive of selected documents. Digitized pages cover 59 sub-series concentrating on the commissions, the secretariats and departments that operated under the Executive Committee of the Communist International (ECCI), the country secretariats and regional bureaus, the party delegations with the COMINTERN and other units of special interest such as the Lenin schools, International Workers Relief and the International Federations of Writers and Theatres.

This database incorporates 10 rare newspapers from the self-proclaimed Donetsk and Luhansk (Lugansk, in local spelling) regions of Ukraine. Both Donetsk People's Republic and Lugansk People's Republic were established as independent state entities after local referendums conducted in May 2014 and organized by the separatists leaders. Although the results of the referenda have not been recognized neither by Ukraine, the EU or the United States, its direct result led to an all out war between the Ukrainian military and pro-Russian separatists resulting in thousands of deaths from both sides.