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Making a DBMS Table Mappable to Display it on a Map
AfterestablishingadatasourceconnectiontoyourDBMSandaddingageometryreferencetothe
tablesyouwishtoworkwith,youcanbeginworkingwiththedatainMapInfoProintabularform(in
aBrowserwindow).ToviewthedataonamapinMapInfoPro,youmustcorrectlynamethespatial
datagoemetryorX,Ycolumnsandthenmakethetablemappable.
Beforemakingatablemappable,reviewtheinstructionsunderCreatingaMapCataloginthe
DBMStoWorkwithDataandAddingaSpatialPrimaryKeytoaDBMSTable.
MapInfoPro'sMakeTableMappablemenuoptionmakesadatabasetable(DBMStable)viewable
onaMapwindowinMapInfoPro.AnytablemaydisplayinaBrowserwindow,butonlymappable
tablescandisplayinaMapwindow.
MakingatablemappableprovidesMapInfoProwithinformationaboutthetable:
•Thecolumncontainingthespatialdata(notapplicabletorelationalOracleSDO)
•Theprojectionsystemofthetable
•Thesymboltouseforallobjectswithoutaperrowstyle
•Thecolumninthetabletouseforperrowstyles
•Theobjecttype
•Thetablebounds,whichinformsMapInfoProoftheentireextentofthedata(usedbyViewand
EntireLayerforexample)
MapInfoProtakesthisinformationandstoresitinatablecalledtheMapInfo_MapCatalog.Every
timeyouuseaDBMStableMapInfoProchecksthecatalogtoseeifthetableismappable.Asa
result,youonlyhavetomakeaDBMStablemappableonce.Itwillalwaysremainmappable.
MakingaTableMappable
UsetheMakeTableMappablemenuoptiononlyfortablesthatyoudidnotpreviouslyuploadwith
EasyLoader,orsavetothedatabasethroughMapInfoPro.
Beforeyoubegin,youmusthaveadatasourceconnecttothedatabasecontainingthetableto
map.Forinstructions,seeCreatingaDataSourceConnection.
Tomakeatablemappable:
1. FromtheTablemenu,selectMaintenance>MakeDBMSTableMappable.
2. IntheSelectDBMSTabledialogbox,selecttheDBMStableyouwanttomakemappableand
clickOpen.
3. IntheMakeTableMappabledialogbox,selectfromtheoptionsandthenclickOKtomakethe
tablemappable.Foroptiondescriptions,seeMakeTableMappabledialogboxOptions.
4. Amessagedialogdisplaystotellyouthatthetablehasbeenmademappable.ClickOK.
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5. TheSelectDBMSTabledialogdisplays.SelectthetabletomakemappableandclickOpen.
ClickCancelifyoudonotwanttomaketablesmappable.
Aftermakingatablemappable,youarereadytobeginworkingwithitinMapInfoPro.Continueto:
WorkingwithSQLServerTables
WorkingwithPostGISTables
WorkingwithOracleSpatialTables
MakeTableMappabledialogboxOptions
IndexType
SelectthespatialindextypeofthecolumnthathasthespatialinformationintheDBMStable.The
spatialindexprovidesafastwayforMapInfoProtoaccessthespatialdatainthetable.Theseven
indextypestochoosefromareSpatialWare,OracleSpatial,OracleAnnotationText,SQLServer
Spatial,PostGISSpatial,MapInfoPro,andXYCoordinates.(YouusetheXYCoordinatesoption
whenthereisnoindex.)
IndexColumn
RequiredforallindextypesexceptXYCoordinates.Choosethenameofthespatialcolumn,orin
thecaseofaMapInfoProindextype,choosethenameoftheMICODEcolumn.
XCoordinate,YCoordinate
RequiredonlyifyouchosetheXYCoordinateorMapInfoProindextype.ChoosetheXandY
columnsthatcontainthepointdatayouwishtomap.
ObjectType
Forspatialdatabases,selectpoint,linear,orregionobjecttypes.(Defaultstopointobjecttypefor
MapInfoProandXYCoordinatesindextypes.)
Point:indicatesthetableonlycancontainpointobjects
Linear:indicatesthetablecanonlycontainlinesandpolylines
Region:indicatesthetablecanonlycontainregionobjects
PerRowStyles
Activatesperrowstylesforthetable,whichenablesyoutousedifferentobjectstylesontheremote
table.Youcanmodifythestylesofindividualobjectsorgroupsofobjectsandsavethemtothe
DBMStable.
ThisoptionisonlyavailablewhentheMapInfo_MapCataloghasthestructuretosupportstyles;it
containsthecolumnsRENDITIONTYPE,RENDITIONCOLUMN,andRENDITIONTABLE,andwhen
thetablehasaminimumofoneChar(character)column.
StyleColumn
Whenthe"PerRowStyle"checkboxhasbeenselected,youmustalsopickaStyleColumnfrom
thedrop-downlistofcandidatecolumns.Anycolumnthatisacharactercolumnisacandidate.
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SincethiscolumnwillbeoverwrittenwiththestylewhentablesaremodifiedwithinMapInfoPro,do
notselectacolumnthatcontainsinformation.
Oncethisisdone,thetableisenabledforperrowstyles.Ifnonewerepreviouslyloadedintothe
tablescolumn,thedefaultstylestoredintheMapInfo_MapCatalogSYMBOLcolumnwillbeused.
YoumaysetnewstylessimplybymodifyingthestyleintheMapwindowandsavingthetable.
Ifthechosencolumnisread-only(itholdsmorethan254charactersforexample),thenyour
mapdataisread-only.
Note:
ObjectStyle
Dependsontheobjecttypesthatthemappabletablecancontain.Youcansetthedefaultstylethat
theobjectswillusefordisplaywhentheyaredownloaded.
Symbol:DisplaystheSymbolStyledialogboxwhereyoucanselectadefaultsymbolforthepoint
data.
Line:DisplaystheLineStyledialogboxwhereyoucanselectadefaultsymbolforthelinedata.
Region:DisplaystheRegionStyledialogboxwhereyoucanselectadefaultsymbolfortheregion
data.
Projection
OpenstheChooseProjectiondialogbox.SpecifytheprojectionfortheDBMStable.Theprojection
mustmatchtheprojectionusedbythecorrespondingremotedatabasetable.
IftheProjectionbuttonisdisabled,theapplicationhasreadtheprojectioninformationfromthe
Oraclemetadataandwillusethatprojectiontodisplaythefile.
TableBounds
OpenstheSetTableBoundsdialogbox,whichletsyouchoosetheoptionsthatdeterminehow
yourdefaultviewandyourentireviewtableboundsarecalculated.Theboundsoptionsyouspecify
inthisdialogboxdefinebothviews.SelectoneoftheseoptionsandclickOKtoimplementthose
boundsoptions.
UseDataBound:BydefaultMapInfoProcalculatestheboundsastheminimumboundingrectangle
ofallthedatainthelayer.Thisrequiresscanningthetableandcalculatingthisvalue.Thisprocess
cantakesometime,soaprogressbardisplaysshowingyoutheprogressofthisoperation.You
cancancelit,ifnecessary.
UseCoordSysBounds:Youcanusethecoordinatesystembounds,butusuallywedonot
recommendit.Thecoordinatesystemboundsareusuallymuchlargerthantheactualdatabounds,
whichmaymakefindingyourdisplayeddatadifficult.Youareusuallyzoomedouttoofartobeable
tolocateyourdataeasily.
UseCustomBounds:Setyourowncustomboundsbasedonthesizeandlocationofyourdata.
Clickthisoptiontomodifyorsettheboundsofyourdata.
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AboutUpdatingDataBoundsintheMapInfo_MapCatalog
TheMapInfo_MapCatalogcontainstheboundsofthedatawithinthetable.Thisdeterminesthe
mapviewwhenopeningthetableasthefirstmapinawindow.Theboundsareseteitherby
EasyLoaderwhenloadingthedata,orfromMapInfoPro'sSetMinimumBoundingRectangletool.
Theboundsautomaticallyadjustwheninsertingorupdatingspatialobjects.Iftheobjectisoutside
theMinimumBoundingRectangle(MBR),MapInfoProexpandstheMBRandupdatesthe
MapInfo_MapCatalog.Deletingobjectsfromthetabledoesnotalterthebounds.
Deciding to work with Linked or Live Access Tables
Therearetwowaysinwhichyoucanworkwithyourdatatables:live(orlivewithcaching)and
linked.Ifyouarenotworkingwithverymuchdata,asmalldatatablesize,thenitdoesnotmatter
ifyouchoosetoworkwithliveorlinkedaccess.
AboutLiveAccessTables
YoucanaccessremotedataasaliveaccesstableusingMapInfoPro.Itiscalledaliveaccess
becausethereisnolocalcopyofthedata,thatis,alloperationsagainstthedatagodirectlytothe
server.Thisdiffersfromlinkedtables,whichdownloadasnapshotfromtheremotedatabaseinto
anativeMapInfoProtable.
YoucanperformmostoperationsonaliveaccesstablethatyoudoforaregularMapInfoProtable.
Forexample,youcanview,edit,copy,andsavealiveaccesslayerjustasyoucanaregularMapInfo
Protable.However,youcannotpackormodifyaliveaccesstable'sstructure.
Livewithcacheisthepreferredwaytoaccesslivetables.MapInfoProprovidessmartcachingto
improveperformanceoflivedataaccessfromremotedatabases.Duringapanoperation,MapInfo
Proretrievesmapdatafromacacheratherthanretrieveitfromtheservereverytime.Onlywhen
thepanrequiresmapdatanotalreadycontainedinthecache,doesitgototheserver.Closingor
refreshingthetableclearsthecache.
WhentheliveaccesstableiscreatinganewMapwindow,theinitialviewisdeterminedbytheentry
intheMapInfo_MapCatalogtable.ThevaluesintheVIEW_*columns,iftheyexist,describea
rectangularareathatistheinitialmapdisplay.Iftheliveaccesstableisbeingaddedasalayerto
anexistingMapwindow,thelayerwillbefittothatMapwindow.
MapInfoProstoresinformationaboutaliveaccesstableinaTABfile.Thisinformationisknownas
metadata.MapInfoProusesmetadatatostoreinformationabouttheliveaccesstablethatisneeded
tomanagetransactionsbetweenMapInfoProandtheserverdatabase.Twoofthemostimportant
kindsofinformationstoredinthemetadataincludetheconnectionstringandthequeryyoubuild
fromtheDBMSTableWizard,orExpertdialogbox.
AboutLinkedTables
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AlinkedtableisaMapInfoProtablethatisareplicaofatabledownloadedfromaremotedatabase
andretainslinkstoitsremotedatabasetable.(TheremotedatabasetableisknownasaDBMS
table.)WhenMapInfoProdownloadsatable,itcopiestheentirecontentsofthetabletothelocal
machine.Anychangesyoumaketothecopycanbecommittedtotheservertableatanytime.
Linkedtablescanbeusedstand-aloneorremainlinkedtotheoriginalserverdatabase.Youcan
refreshlinkedtablestorerunqueriesonaregularbasisusingtheRefresh
toolorfromtheTable>
Maintenance>RefreshDBMSTablemenu.Aftereditingdatainalinkedtable,MapInfoProsaves
ittotheRDBSinamannerthatresolvesanymulti-editingconflicts.Savingtheeditsmadetoa
linkedtablecommitsthemtotheserverdatabaseaswellastothelinkedtable.
ComparingandContrastingLiveandLinkedAccesstoaTable
Usethefollowinginformationtodecidewhethertoworkwithyourremotedatatablesliveorlinked.
LiveTable
LinkedTable
DataisreadfromtheDBMSServerasrequired.
Whenthedataislocallycached,thelifeofthe
cacheislimitedtothecurrentsession.
AfullreplicaoftheDBMStableisdownloadedto
theclientmachine.Thelocalreplicaretains
referencetotheremotedatasource(ODBC/OCI
Connectionparameters);Thedownloadedcopy
isretainedacrosssessionsofMapInfoPro.
Definition
Livetablesaresuitableforreadingandediting
dynamicallychangingdata;ordatasetsthatdo
Linkedtablesaresuitableforbackdropdisplay
data,ordatathatdoesnotchangemuch.Linked
Suitability
notfitwithinthelimitsof2GBperdatafile.Live
tablesareeditable,aslongasthebasetables
theyarebasedonareeditable.
tablesarerecommendedifyouwanttomaintain
datasecurity(thedatamustremainonlyina
singlesecurelocation).
Thecostofdatatransferisincurredalittlebitat
atime.Livetablesareaccessedrealtimefrom
Asthedataisentirelylocal,thereisaone-time
costofdownloadingthedata,butsubsequent
Performance
Factors
thedatabase,asrequired.Optionally,records
fromthelivetablecanbelocallycachedforthe
accessisfast,comparabletonativetableaccess,
sincetheuserdoesnotincurthecostofnetwork
lengthoftheMapInfoProsession.Caching
trafficeverytimethedataneedstobeaccessed
formapping,orforanalysis.
enhancesperformance,becausethedataisnot
fetchedmultipletimesastheuser,zooms,pans,
orbrowsesaroundthedata.
Thisisanetworkintensiveoption.
Linkedtablesarelimitedto2GBperdatafile;
Linkedtablesarenotrefreshedunlesstheuser
explicitlyrefreshesthetable.Youcannotpacka
Limitations
linkedtable.Youcannotmodifythetablestructure
ofalinkedtable.
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Formoreinformation,seeImprovingLiveAccessPerformanceintheHelpSystem.
Opening a DBMS Table in MapInfo Pro
Aftercompletingtheinstructionsinthefollowingsections:
CreatingaDataSourceConnection
CreatingaMapCatalogintheDBMStoWorkwithData
MakingaDBMSTableMappabletoDisplayitonaMap
youarereadytoconnecttoyourdatasourcesandthedatabasetablesyouwanttoworkwith.If
youarenotfamiliarwiththedetailsofyourremotedatabasetype,discussyourrequirementswith
yourdatabaseadministratortofindoutthebasicinformationnecessarytoconnecttoyourdatabase.
OptionsforOpeningTables
WhenopeningDBMStables,thereareanumberofoptionsfor:
•Whichtablesinthedatabasetoopenorselecttoopenalloftheavailabletables.
•Whethertoopenthetablesliveorlinked.Ifselectinglinked,youcanopenthemwithcaching.You
cansetthisoptionindividuallyforatabletooverridewhatissetforallthetablesyouwillopen.
•Howyouwantthedatatodisplayonthemapbyselectingpoint,line,andregionstyleoptions.
Youcanchange:symboltype,color,andsize,aswellasthelabelfont;linecolorandpattern;
regionfillcolorandpattern,andbordercolorandpattern.
•Columnandrowfiltersontables.Filtersletyoureducetheamountofinformationthatyouwill
workwithandreducethetimeittakestofetchandsavethedata.
•AdirectorywheretheMapInfoTABfile(withthesamenameasthetable)willbesaved.
Youcanapplytheseselectionstoallofthetablesyouwillopenandalsoselectoverridesforindividual
tables.
PerformingQueriesonTables
Whenperformingaqueryonatablethequeryexecuteswhen:
•Linkedtables:Openingthetableforthefirsttime,andwhenrefreshingthetable.
•Livewithcache:Addingthetabletothemap,andzoomingorpanninginthemap.
•Livewithoutcache:Addingthetabletothemap,zoomingorpanninginthemap,andclickingin
themapwiththeSelectorInfotools.
Youcanspecifywhichrecordstoretrievefromthedatabasebyattributeorbygeography.Thequery
syntaxisspecifictothedatabasethatyouareaccessing.MapInfoProtranslatessomeexpressions
whenpassingaquerytothedatabase,suchasObject,Within,Selection,andCurrent_Mapper.
Youmaysaveyourqueries,sothatyoucanreusethem.
TablesandMetadata
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MapInfoProstoresinformationaboutatableinthe.tabfile'smetadata,whichisnotdisplayedon
themap.MapInfoProusesmetadatatomanagetransactionsbetweenMapInfoProandtheserver
database.Twoofthemostimportantkindsofinformationstoredinthemetadataincludethe
connectionstringandthequeryyoubuildfromtheDBMSTableWizard,orExpertdialogbox.
OpeningaDBMSTable
ThissectiondescribeshowtoopenaDBMStable.
TheconnectiontoyourDBMSmustbeopenbeforeyoucanopenatable.Ifyouhavenotyetopened
aconnectionorifyouhaverestartedMapInfoPro(andmustre-openaconnection),see
ReconnectingtoyourDataSourceafterStartup.
Toopenadatabasetable:
1. SelectFile>Open.
2. IntheOpendialogbox,fromtheFilesoftypelist,selecttheDBMSconnectiontoworkwith.
TheDBMSconnectionsthatyoucreatedpreviously(asdescribedunderCreatingaDataSource
Connection)areatthebottomoftheFilesoftypedrop-downlist.Ifyouhavemorethanone
connection,thentheconnectionnamecontainsasequentialnumberindicatingtheorderinwhich
theconnectionwasadded.
TheSelectOneorMoreTablestoOpendialogboxopens.
3. IntheDatabaseTableslist,selectatabletoopenbyaddingacheckmarkbesidethetable
name.
Youcanselectoneormoretables.Onlythetablesthathaveacheckmarkbesidethemwillopen.
4. Optionally,selecthowyouwantthedatatodisplayonthemapbyselecting(highlighting)the
tablenameandclickingStyle.
ThisopenstheChangeTableObjectStyledialogboxwhereyoucanspecifythedisplaystyle
forgeometry(spatialobjecttypes),suchassymbols,lines,andregionsinthetable.Thecustom
stylesthatyousetonlyapplytothetablethatyouhighlighted(whetherithasacheckmarkbeside
itornot).
Toselectmorethanonetable,pressCtrl
whileselectingtablenames.Yourstylechoicesare
madetoallofthetablesthatyouselect(thatarehighlightedintheDatabaseTableslist).
5. FromthePreferredViewdrop-downlist,selecttheviewyouwantofthisdata.
•Automatic-MapInfoProchoosesthemostappropriateview.Ifthedataismappable(for
example,graphicobjectsareattachedtothedata),forexample,MapInfoProopensthetable
inaMapwindow.IfyouhaveaMapwindowdisplayedandthetableyouwanttoopenis
mappable,MapInfoProwillautomaticallyopenthetableinthecurrentMapwindow.Ifthedata
isnotmappable,MapInfoProwillattempttoopenthetableinaBrowserwindow.Ifthetable
cannotbemappedorbrowsed,MapInfoProopensthetableusingtheNoViewoption(nodata
isdisplayed).
•Browser-MapInfoProattemptstoopenthetableinaBrowserwindow.
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•CurrentMapper-MapInfoProattemptstoaddyourdatatothecurrentMapwindow.
•NewMapper-MapInfoProattemptstoopenthetableinanewMapwindow.
•NoView-MapInfoProopensthetablemakingthedataavailableforotheruses,butnodata
isdisplayed.
WhenyouopenatableandselectanoptioninthePreferredViewdrop-downlist,MapInfo
Prorememberswhatyouselectedandusesthesameoptionthenexttimeyouopenatable.
6. ClickOK.
IfaMapInfomessagedialogdisplaysaskingifyouwanttooverwritetheexistingfile,clickOK.
Youhavepreviouslyopenedthisfileandthereisatemporarycopyofthefileonyourmachine.
MapInfoProwilloverwritethistemporarycopy.
Thetable,ortables,fromyourselectionopeninaMapwindow(orinaTablebrowserifthedatais
notmappable).
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CreatingaNewDBMSTable
TocreateanewDBMStable:
1. ChooseFile>NewTable.
2. IntheNewTabledialogbox:
a. Specifyhowyouwantthetableopened:Browser,Mapper,orCurrentMapper.
b.Specifywhetheryouwantthetablestructuretobebasedonanexistingtableoryouwant
MapInfoProtocreateanewtablestructure.
c. ClickCreate.
3. IntheNewTableStructuredialogboxspecifythefieldname,fieldtype,numberofcharacters
(width),andwhetherornottoindexforeachfieldinyournewdatabase.ClickCreate.
Ifyouareusingthestructurefromanothermappabletable,thenMapInfoProsetsthenewtable
projectiontotheprojectionofthesourcetable.Collectively,thisinformationisthestructureof
yourdatabase.
Youindicatewhetherthetableismappablebyassociatinggraphicobjectswithrecords
and,ifso,whetherthemapistobeanearthoranon-earthmap.
Note:
4. IntheCreateNewTabledialogbox,fromtheSaveastypedrop-downlist,selectaDBMStype.
ThedialogboxdisplaysDBMSconnectioncontrols.
IntheFilenamebox,typeafilenameandclickSave.
Dependingonthedatabasetypethatyouselected,thenewtableopensinMapInfoProortheNew
DBMSTableOptionsdialogboxopens.IfyouseetheNewDBMSTableOptionsdialogboxthen
continuetothenextsection.
SettingNewDBMSTableOptions
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TosetnewDBMStableoptions,followtheinstructionsunderCreatingaNewDBMSTable.
Dependingonthedatabasetypethatyouselect,theNewDBMSTableOptionsdialogboxopens.
Thisdialogboxhasthreetabs,General,Spatial,andStyles.Refertothefollowingsectionsfor
informationabouteachtabofoptions.
IfyouclearedtheMakeTableMappablecheckboxinCreateNewTabledialogbox,thenthe
DBMSTableOptionsdialogboxshowsonlytheGeneraltab.
GeneralTab
UndertheGeneraltabcompletetheappropriateselections:
•TABfilelocation-Displaysthenameandpathofthe.tabfilethatwillbecreated.Youcan
manuallytypeafilenameorusetheSaveAsdialogbox(viaBrowsebutton)tochooseafilename.
MapInfoProusesthelastdirectorywhereyousavedaDBMS.tabwhenconstructingthedefault
filenamefullpath.Ifthisdirectorydoesnotexist,thentheRemoteTablespreferencedirectoryis
used.ThefilenamepartofthedefaultpathisbasedonthenameofthespecifiedDBMStable
name.
•Browse(...)button-DisplaystheSaveAsdialogboxsotheusercanchoosea.tabfilename.
Initializedwiththetextinthe.tabfilenameeditbox.
•PrimaryKeyColumn-Letsyouspecifyakeycolumnforthenewtable.Withoutakeycolumna
DBMStablecannotbeopenasliveaccessandcanonlybeopenedreadonlyasLinked.
IfthePrimaryKeyColumncheckboxisselected,thenthecorrespondingcomboboxisenabled.
YoucaneitherchooseacolumnthatwasspecifiedintheNewTableStructuredialogboxor
specifyanewcolumnbytypingintothecombobox'seditcontrol.
BydefaultthePrimaryKeyColumncheckboxisselectedandanewcolumnisspecified.The
defaultnameofthenewcolumndependsontheDBMSconnection:MI_PRINXforOracleSpatial,
SW_MEMBERforallothers.
•DownloadData(LinkedTable)-Selecttoestablishalinkedconnectiontothistable.
•LiveAccess-Selecttoaccessthistablewithaliveconnection.
•Cache-Selecttosavethetabletothelocalbufferandthenreadthetabledatafromthebuffer.
Accesstimetodataisfasterbutyouarenotworkingwiththemostcurrentversion.Refreshoccurs
whenyouzoom,pan,orselect.Unselecttoreadthetabledirectlyfromthedatasource,whichis
thecurrentversion.
TheCachecheckboxenablesafterselectingtheLiveAccessoption.
SpatialTab
ClicktheSpatialtabandspecifytheindextypeandcoordinatecolumnselections:
•IndexType-Thissettingdeterminesthetypeofspatialindexingusedonthetable.TypesMapInfo
(MICODE)andXYarealwaysavailable.Serverspecifictypesmayalsobelisted.Theindextype
selectionaffectsthestateoftheotherthreecontrolsinthistab.
•IndexColumn-Specifytheprimaryspatialindexcolumnfromthelist.Thisoptionisalways
available,exceptwhentheindextypeisXY.
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