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ExtantSuns (talk | contribs) Add note about ADS API, and source for Bumblebee becoming default + ADS classic |
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At first, the journal articles available via ADS were [[Image scanner|scan]]ned [[bitmap]]s created from the paper journals, but from 1995 onwards, the ''[[Astrophysical Journal]]'' began to publish an on-line edition, soon followed by the other main journals such as ''[[Astronomy and Astrophysics]]'' and the ''[[Monthly Notices of the Royal Astronomical Society]]''. ADS provided links to these electronic editions from their first appearance. Since the year 1995, the number of ADS users has doubled roughly every two years. ADS now has agreements with almost all astronomical journals, who supply abstracts. Scanned articles from as far back as the early 19th century are available via the service, which now contains over eight million documents.
In 2011 the ADS launched ADS Labs Streamlined Search which introduced [https://www.researchgate.net/publication/228582891_Retrieval_from_facet_spaces facets] for query refinement and selection. In 2013 ADS Labs 2.0 featuring a new search engine, full-text search functionality, scalable facets and an API was introduced. In 2015 the new ADS, codenamed Bumblebee, was released as ADS-beta. The ADS-beta system features a microservices API and client-side dynamic page loading served on a cloud platform. In May 2018 the beta label was dropped and Bumblebee became the default ADS interface -- with some legacy features (ADS Classic) remaining available. <ref>{{Cite journal |last=Accomazzi |first=Alberto |last2=Kurtz |first2=Michael J. |last3=Henneken |first3=Edwin |last4=Grant |first4=Carolyn S. |last5=Thompson |first5=Donna M. |last6=Chyla |first6=Roman |last7=McDonald |first7=Steven |last8=Shaulis |first8=Taylor J. |last9=Blanco-Cuaresma |first9=Sergi |last10=Shapurian |first10=Golnaz |last11=Hostetler |first11=Timothy W. |last12=Templeton |first12=Matthew R. |last13=Lockhart |first13=Kelly E. |date=2018-01-01 |title=ADS Bumblebee comes of age |url=https://ui.adsabs.harvard.edu/abs/2018AAS...23136217A |volume=231 |pages=362.17}}</ref>. Development continues to the present day, with an extensible [[API]] available: enabling users to build their own utilities on top of the ADS bibliographic record.
The ADS service is distributed worldwide, with twelve [[Web mirror|mirror sites]] in twelve countries on five continents, with the database synchronized by means of weekly updates using [[rsync]], a mirroring utility which allows updates to only the portions of the database which have changed. All updates are triggered centrally, but they initiate scripts at the mirror sites which "pull" updated data from the main ADS servers.<ref name="architecture">{{cite journal|last=Accomazzi |first=A. |author2=Eichhorn G. |author3=Kurtz M.J. |author4=Grant C.S. |author5=Murray S.S. |year=2000 |title=The NASA Astrophysics Data System: Architecture |journal=Astronomy and Astrophysics Supplement |volume=143 |issue=1 |pages=85–109 |doi=10.1051/aas:2000172 |bibcode=2000A&AS..143...85A |arxiv=astro-ph/0002105 |s2cid=7182316 }}</ref>
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