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Abstract
AMI (ATLAS Metadata Interface) is a generic ecosystem for metadata aggregation, transformation and cataloguing. Often, it is interesting to share up-to-date metadata with other content services such as wikis. Here, the cross-domain solution implemented in the AMI Web Framework is described: a system of embeddable controls, communicating with the central AMI service and based on the AJAX and CORS technologies. The main available controls and their basic usage are also described.
Highlights
ThefirstAMIecosystem architectureprinciplesweredesignedbetween2002and2003.In order to withstand the inevitable evolutions in technology and requirements, a n-tier architecture(Figure1)waschosen.Thelayersofthen-tierarchitecturearewelldecoupled, making AMI a scalable and flexible ecosystem for developing metadata-oriented applications
OutlookAMI is a well-established and mature ecosystem, providing Web interfaces and applicationstoabout3000activeusersoftheATLAScollaboration.AlltheAMIWeb interfacesarebeingmigratedtothenewAMIWebFrameworkinordertobenefitfrom its innovations.AlthoughtherewritingofATLASproductioninterfacesshouldbeinitiated carefullyinordertoensurethecontinuityofservice,itcanbeseenasagreatimprovement intermsofre-usabilityofgraphicalcomponents.AWFiswelldocumented[14]andcanbe usedindependentlyoftheAMIcoresystem.Since2017,theRosetta/Philaeexperiment[15, 16],inthefieldofAstrophysics,hasexpressedinterestinAWF,startingtodeveloptheir owncontrolswithaminimum ofsupportoftheAMITeam.Theteam willstillworkon improvingAWFandaddingnew genericcontrols,inordertoprovideacompletesetof ready-to-usecomponentstoexperiments
Summary
AMI[1,2]isanecosystem designedformetadatabookkeepingandmainlyusedbythe ATLASexperiment[3]attheLargeHadronCollider(LHC).Thousandsofphysicistsuse severalAMItoolsdailywhicharepartsoftheofflinesoftwareoftheATLASexperiment, inordertodisplayormanagetheirdatafromSQLorNoSQLdatabases.Asanexample,the AMIdatasetdiscoverytoolisusedtocatalogtheofficialATLASdatasetsavailablefor analysis.Ithasbeentheofficialdatasetbookkeepingtooloftheexperimentsince2006.As anotherexample,theAMI-Tagstoolpermitssettinguptheconfigurationparametersused by data processing and analysis jobs. AMIisamatureecosystem,sinceitsbasicarchitecturehasbeenmaintainedforover fifteenyears.Theecosystemcontinuouslyscalesbothhardwareandsoftwareinfrastructure sothatthequalityofserviceremainshigh[4].,severalrequestsmadebythe ATLASphysicistcommunity,concerningeitherdatasharingonvarioussupportslikewikis ortotallynewWebapplications,requiredacompleteredesignoftheecosystem interface subsystem.
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