");vwo_$('head').append(_vwo_sel);return vwo_$('head')[0] && vwo_$('head')[0].lastChild;})("HEAD")}}, R_743027_63_1_3_0:{ fn:function(log,nonce=''){return (function(x) { if(!vwo_$.fn.vwoRevertHtml){ return; }; var ctx=vwo_$(x),el; /*vwo_debug log("Revert","content",""); vwo_debug*/; el=vwo_$('[vwo-element-id="1745439018283"]'); el.revertContentOp().remove();})("HEAD")}}, C_743027_63_1_3_1:{ fn:function(log,nonce=''){return (function(x) {var ctx=vwo_$(x),el; /*vwo_debug log("editElement",".vwo-subhead"); vwo_debug*/; el=vwo_$(".vwo-subhead"); el.html("Wed, May 7, 2025 - 3.00pm CEST / 09.00am EDT");})(".vwo-subhead")}}, R_743027_63_1_3_1:{ fn:function(log,nonce=''){return (function(x) { if(!vwo_$.fn.vwoRevertHtml){ return; }; var ctx=vwo_$(x),el; /*vwo_debug log("Revert","editElement",".vwo-subhead"); vwo_debug*/; el=vwo_$(".vwo-subhead"); el.vwoRevertHtml();})(".vwo-subhead")}}},rules:[{"tags":[{"data":"campaigns.52","priority":4,"id":"runCampaign"}],"triggers":["7538449"]},{"tags":[{"id":"metric","data":{"campaigns":[{"c":23,"g":3}],"type":"g"},"metricId":0}],"triggers":["11218597"]},{"tags":[{"id":"metric","data":{"campaigns":[{"c":23,"g":1}],"type":"m"},"metricId":393026}],"triggers":["3699301"]},{"tags":[{"data":"campaigns.45","priority":4,"id":"runCampaign"}],"triggers":["7538449","7538452"]},{"tags":[{"data":"campaigns.23","priority":4,"id":"runCampaign"}],"triggers":["3467935","3467937","3891148","3868378","3868381","3699280","3868375","3868372","3868366","3868369","3868363","3868360"]},{"tags":[{"data":"campaigns.24","priority":4,"id":"runCampaign"}],"triggers":["3926488","3926491","3926494","3926497","3926500","3926503","3926506","3926509"]},{"tags":[{"data":"campaigns.26","priority":4,"id":"runCampaign"}],"triggers":["3467935","3467937","3474327","3474329"]},{"tags":[{"id":"metric","data":{"campaigns":[{"c":63,"g":5}],"type":"m"},"metricId":1420029}],"triggers":["13465482"]},{"tags":[{"id":"metric","data":{"campaigns":[{"c":45,"g":2}],"type":"m"},"metricId":856873}],"triggers":["7538455"]},{"tags":[{"data":"campaigns.57","priority":4,"id":"runCampaign"}],"triggers":["11348767","11348770","11348773"]},{"tags":[{"data":"campaigns.63","priority":4,"id":"runCampaign"}],"triggers":["13465101"]},{"tags":[{"id":"metric","data":{"campaigns":[{"c":24,"g":1}],"type":"m"},"metricId":394880}],"triggers":["3204947"]},{"tags":[{"id":"metric","data":{"campaigns":[{"c":62,"g":2}],"type":"m"},"metricId":1302544}],"triggers":["11901466"]},{"tags":[{"id":"metric","data":{"campaigns":[{"c":57,"g":2}],"type":"m"},"metricId":1246453}],"triggers":["11348776"]},{"tags":[{"id":"metric","data":{"campaigns":[{"c":52,"g":2}],"type":"m"},"metricId":1209280}],"triggers":["10859356"]},{"tags":[{"data":"campaigns.62","priority":4,"id":"runCampaign"}],"triggers":["12415740"]},{"tags":[{"id":"metric","data":{"campaigns":[{"c":62,"g":3}],"type":"m"},"metricId":1109587}],"triggers":["11218462"]},{"tags":[{"data":"campaigns.33","priority":4,"id":"runCampaign"}],"triggers":["3467935","3467937","4049039"]},{"tags":[{"id":"metric","data":{"campaigns":[{"c":52,"g":3}],"type":"m"},"metricId":460042},{"id":"metric","data":{"campaigns":[{"c":23,"g":2}],"type":"m"},"metricId":460042}],"triggers":["3891109"]},{"tags":[{"id":"metric","data":{"campaigns":[{"c":63,"g":6}],"type":"m"},"metricId":1420032}],"triggers":["13465485"]},{"tags":[{"data":"campaigns.50","priority":4,"id":"runCampaign"}],"triggers":["11348713","11348716","11607274"]},{"tags":[{"id":"metric","data":{"campaigns":[{"c":33,"g":1}],"type":"g"},"metricId":0}],"triggers":["4049042"]},{"tags":[{"data":"campaigns.53","priority":4,"id":"runCampaign"}],"triggers":["10597825","10597828","10597831"]},{"tags":[{"id":"metric","data":{"campaigns":[{"c":67,"g":1}],"type":"m"},"metricId":256165}],"triggers":["13418928"]},{"tags":[{"data":"campaigns.67","priority":4,"id":"runCampaign"}],"triggers":["7538449","7538452","13418922","13418925"]},{"tags":[{"id":"metric","data":{"campaigns":[{"c":26,"g":1}],"type":"m"},"metricId":418573}],"triggers":["3474331"]},{"tags":[{"id":"metric","data":{"campaigns":[{"c":53,"g":1}],"type":"m"},"metricId":1094613},{"id":"metric","data":{"campaigns":[{"c":50,"g":1}],"type":"m"},"metricId":1094613}],"triggers":["9901843"]},{"tags":[{"priority":2,"id":"visibilityService"}],"triggers":["9"]},{"tags":[{"id":"runTestCampaign"}],"triggers":["2"]},{"tags":[{"id":"urlChange"}],"triggers":["75"]},{"tags":[{"id":"checkEnvironment"}],"triggers":["5"]},{"tags":[{"priority":2,"id":"groupCampaigns"},{"priority":3,"id":"prePostMutation"}],"triggers":["8"]}],pages:{"ec":[{"256778":{"inc":["o",["url","urlReg","(?i).*"]]}},{"567821":{"inc":["o",["url","urlReg","(?i).*https?\\:\\\/\\\/(w{3}\\.)?oclc\\.org.*"],["url","urlReg","(?i).*https?\\:\\\/\\\/(w{3}\\.)?blog\\.oclc\\.org.*"],["url","urlReg","(?i).*https?\\:\\\/\\\/(w{3}\\.)?policies\\.oclc\\.org.*"]]}}]},pagesEval:{"ec":[256778,567821]},stags:{}}})(); ;;var commonWrapper=function(argument){if(!argument){argument={valuesGetter:function(){return{}},valuesSetter:function(){},verifyData:function(){return{}}}}const getVisitorUuid=function(){if(window._vwo_acc_id>=1037725){return window.VWO&&window.VWO.get("visitor.id")}else{return window.VWO._&&window.VWO._.cookies&&window.VWO._.cookies.get("_vwo_uuid")}};var pollInterval=100;var timeout=6e4;return function(){var accountIntegrationSettings={};var _interval=null;function waitForAnalyticsVariables(){try{accountIntegrationSettings=argument.valuesGetter();accountIntegrationSettings.visitorUuid=getVisitorUuid()}catch(error){accountIntegrationSettings=undefined}if(accountIntegrationSettings&&argument.verifyData(accountIntegrationSettings)){argument.valuesSetter(accountIntegrationSettings);return 1}return 0}var currentTime=0;_interval=setInterval((function(){currentTime=currentTime||performance.now();var result=waitForAnalyticsVariables();if(result||performance.now()-currentTime>=timeout){clearInterval(_interval)}}),pollInterval)}}; commonWrapper({valuesGetter:function(){return {"ga4s":0}},valuesSetter:function(data){var singleCall=data["ga4s"]||0;if(singleCall){window.sessionStorage.setItem("vwo-ga4-singlecall",true)}var ga4_device_id="";if(typeof window.VWO._.cookies!=="undefined"){ga4_device_id=window.VWO._.cookies.get("_ga")||""}if(ga4_device_id){window.vwo_ga4_uuid=ga4_device_id.split(".").slice(-2).join(".")}},verifyData:function(data){if(typeof window.VWO._.cookies!=="undefined"){return window.VWO._.cookies.get("_ga")||""}else{return false}}})(); var pushBasedCommonWrapper=function(argument){var firedCamp={};if(!argument){argument={integrationName:"",getExperimentList:function(){},accountSettings:function(){},pushData:function(){}}}return function(){window.VWO=window.VWO||[];const getVisitorUuid=function(){if(window._vwo_acc_id>=1037725){return window.VWO&&window.VWO.get("visitor.id")}else{return window.VWO._&&window.VWO._.cookies&&window.VWO._.cookies.get("_vwo_uuid")}};var sendDebugLogsOld=function(expId,variationId,errorType,user_type,data){try{var errorPayload={f:argument["integrationName"]||"",a:window._vwo_acc_id,url:window.location.href,exp:expId,v:variationId,vwo_uuid:getVisitorUuid(),user_type:user_type};if(errorType=="initIntegrationCallback"){errorPayload["log_type"]="initIntegrationCallback";errorPayload["data"]=JSON.stringify(data||"")}else if(errorType=="timeout"){errorPayload["timeout"]=true}if(window.VWO._.customError){window.VWO._.customError({msg:"integration debug",url:window.location.href,lineno:"",colno:"",source:JSON.stringify(errorPayload)})}}catch(e){window.VWO._.customError&&window.VWO._.customError({msg:"integration debug failed",url:"",lineno:"",colno:"",source:""})}};var sendDebugLogs=function(expId,variationId,errorType,user_type){var eventName="vwo_debugLogs";var eventPayload={};try{eventPayload={intName:argument["integrationName"]||"",varId:variationId,expId:expId,type:errorType,vwo_uuid:getVisitorUuid(),user_type:user_type};if(window.VWO._.event){window.VWO._.event(eventName,eventPayload,{enableLogs:1})}}catch(e){eventPayload={msg:"integration event log failed",url:window.location.href};window.VWO._.event&&window.VWO._.event(eventName,eventPayload)}};const callbackFn=function(data){if(!data)return;var expId=data[1],variationId=data[2],repeated=data[0],singleCall=0,debug=0;var experimentList=argument.getExperimentList();var integrationName=argument["integrationName"]||"vwo";if(typeof argument.accountSettings==="function"){var accountSettings=argument.accountSettings();if(accountSettings){singleCall=accountSettings["singleCall"];debug=accountSettings["debug"]}}if(debug){sendDebugLogs(expId,variationId,"intCallTriggered",repeated)}if(singleCall&&(repeated==="vS"||repeated==="vSS")||firedCamp[expId]){return}window.expList=window.expList||{};var expList=window.expList[integrationName]=window.expList[integrationName]||[];if(expId&&variationId&&["VISUAL_AB","VISUAL","SPLIT_URL"].indexOf(_vwo_exp[expId].type)>-1){if(experimentList.indexOf(+expId)!==-1){firedCamp[expId]=variationId;var visitorUuid=getVisitorUuid();var pollInterval=100;var currentTime=0;var timeout=6e4;var user_type=_vwo_exp[expId].exec?"vwo-retry":"vwo-new";var interval=setInterval((function(){if(expList.indexOf(expId)!==-1){clearInterval(interval);return}currentTime=currentTime||performance.now();var toClearInterval=argument.pushData(expId,variationId,visitorUuid);if(debug&&toClearInterval){sendDebugLogsOld(expId,variationId,"",user_type);sendDebugLogs(expId,variationId,"intDataPushed",user_type)}var isTimeout=performance.now()-currentTime>=timeout;if(isTimeout&&debug){sendDebugLogsOld(expId,variationId,"timeout",user_type);sendDebugLogs(expId,variationId,"intTimeout",user_type)}if(toClearInterval||isTimeout){clearInterval(interval)}if(toClearInterval){window.expList[integrationName].push(expId)}}),pollInterval||100)}}};window.VWO.push(["onVariationApplied",callbackFn]);window.VWO.push(["onVariationShownSent",callbackFn])}}; var surveyDataCommonWrapper=function(argument){if(!argument){argument={getCampaignList:function(){return[]},surveyStatusChange:function(){},answerSubmitted:function(){}}}return function(){window.VWO=window.VWO||[];function getValuesFromAnswers(answers){var values=[];for(var i=0;i=timeout;if(toClearInterval||isTimeout){clearInterval(interval)}}),pollInterval)}}window.VWO.push(["onSurveyShown",function(data){commonSurveyCallback(data,argument.surveyStatusChange,"surveyShown")}]);window.VWO.push(["onSurveyCompleted",function(data){commonSurveyCallback(data,argument.surveyStatusChange,"surveyCompleted")}]);window.VWO.push(["onSurveyAnswerSubmitted",function(data){commonSurveyCallback(data,argument.answerSubmitted,"surveySubmitted")}])}}; (function(){var VWOOmniTemp={};window.VWOOmni=window.VWOOmni||{};for(var key in VWOOmniTemp)Object.prototype.hasOwnProperty.call(VWOOmniTemp,key)&&(window.VWOOmni[key]=VWOOmniTemp[key]);window._vwoIntegrationsLoaded=1;pushBasedCommonWrapper({integrationName:"GA4",getExperimentList:function(){return [21,24,26,1,23,33,45,53,52,62,57,63,50,67]},accountSettings:function(){var accountIntegrationSettings={"manualSetup":true,"setupVia":"gtm","dataVariable":"dataLayer"};if(accountIntegrationSettings["debugType"]=="ga4"&&accountIntegrationSettings["debug"]){accountIntegrationSettings["debug"]=1}else{accountIntegrationSettings["debug"]=0}return accountIntegrationSettings},pushData:function(expId,variationId){var accountIntegrationSettings={"manualSetup":true,"setupVia":"gtm","dataVariable":"dataLayer"};var ga4Setup=accountIntegrationSettings["setupVia"]||"gtag";if(typeof window.gtag!=="undefined"&&ga4Setup=="gtag"){window.gtag("event","VWO",{vwo_campaign_name:window._vwo_exp[expId].name+":"+expId,vwo_variation_name:window._vwo_exp[expId].comb_n[variationId]+":"+variationId});window.gtag("event","experience_impression",{exp_variant_string:"VWO-"+expId+"-"+variationId});return true}return false}})();pushBasedCommonWrapper({integrationName:"GA4-GTM",getExperimentList:function(){return [21,24,26,1,23,33,45,53,52,62,57,63,50,67]},accountSettings:function(){var accountIntegrationSettings={"manualSetup":true,"setupVia":"gtm","dataVariable":"dataLayer"};if(accountIntegrationSettings["debugType"]=="gtm"&&accountIntegrationSettings["debug"]){accountIntegrationSettings["debug"]=1}else{accountIntegrationSettings["debug"]=0}return accountIntegrationSettings},pushData:function(expId,variationId){var accountIntegrationSettings={"manualSetup":true,"setupVia":"gtm","dataVariable":"dataLayer"};var ga4Setup=accountIntegrationSettings["setupVia"]||"gtm";var dataVariable=accountIntegrationSettings["dataVariable"]||"dataLayer";if(typeof window[dataVariable]!=="undefined"&&ga4Setup=="gtm"){window[dataVariable].push({event:"vwo-data-push-ga4",vwo_exp_variant_string:"VWO-"+expId+"-"+variationId});return true}return false}})(); ;})();(function(){window.VWO=window.VWO||[];var pollInterval=100;var _vis_data={};var intervalObj={};var analyticsTimerObj={};var experimentListObj={};window.VWO.push(["onVariationApplied",function(data){if(!data){return}var expId=data[1],variationId=data[2];if(expId&&variationId&&["VISUAL_AB","VISUAL","SPLIT_URL"].indexOf(window._vwo_exp[expId].type)>-1){}}])})();; ;var vD=VWO.data||{};VWO.data={content:{"fns":{"list":{"vn":1,"args":{"1":{}}}}},as:"r6.visualwebsiteoptimizer.com",dacdnUrl:"https://dev.visualwebsiteoptimizer.com",accountJSInfo:{"pc":{"a":0,"t":0},"pvn":-1,"rp":7,"gC":[{"wt":{"20":1,"1":99},"et":2,"id":1,"c":[1,20],"t":1},{"p":[50,57],"et":2,"id":2,"c":[50,57],"t":1},{"wt":{"63":75,"68":25},"et":2,"id":3,"c":[63,68],"t":1}],"ts":1745486451,"noSS":false}};for(var k in vD){VWO.data[k]=vD[k]};;var gcpfb=function(a,loadFunc,status,err,success){function vwoErr() {_vwo_err({message:"Google_Cdn failing for " + a + ". Trying Fallback..",code:"cloudcdnerr",status:status});} if(a.indexOf("/cdn/")!==-1){loadFunc(a.replace("cdn/",""),err,success); vwoErr(); return true;} else if(a.indexOf("/dcdn/")!==-1&&a.indexOf("evad.js") !== -1){loadFunc(a.replace("dcdn/",""),err,success); vwoErr(); return true;}};window.VWO=window.VWO || [];window.VWO._= window.VWO._ || {};window.VWO._.gcpfb=gcpfb;;var d={cookie:document.cookie,URL:document.URL,referrer:document.referrer};var w={VWO:{_:{}},location:{href:window.location.href,search:window.location.search},_vwoCc:window._vwoCc};;window._vwo_cdn="https://dev.visualwebsiteoptimizer.com/cdn/";window._vwo_apm_debug_cdn="https://dev.visualwebsiteoptimizer.com/cdn/";window.VWO._.useCdn=true;window.vwo_eT="br";window._VWO=window._VWO||{};window._VWO.fSeg=["21","1"];window._VWO.dcdnUrl="/dcdn/settings.js";window.VWO.sTs=1745485404;window._VWO._vis_nc_lib=window._vwo_cdn+"edrv/nc-e3df3b7b79e119caa31ef1067a99180fbr.js";var loadWorker=function(url){_vwo_code.load(url, { dSC: true, onloadCb: function(xhr,a){window._vwo_wt_l=true;if(xhr.status===200 ||xhr.status===304){var code="var window="+JSON.stringify(w)+",document="+JSON.stringify(d)+";window.document=document;"+xhr.responseText;var blob=new Blob([code||"throw new Error('code not found!');"],{type:"application/javascript"}),url=URL.createObjectURL(blob);window.mainThread={webWorker:new Worker(url)};window.vwoChannelFW=new MessageChannel();window.vwoChannelToW=new MessageChannel();window.mainThread.webWorker.postMessage({vwoChannelToW:vwoChannelToW.port1,vwoChannelFW:vwoChannelFW.port2},[vwoChannelToW.port1, vwoChannelFW.port2]);if(!window._vwo_mt_f)return window._vwo_wt_f=true;_vwo_code.addScript({text:window._vwo_mt_f});delete window._vwo_mt_f}else{if(gcpfb(a,loadWorker,xhr.status)){return;}_vwo_code.finish("&e=loading_failure:"+a)}}, onerrorCb: function(a){if(gcpfb(a,loadWorker)){return;}window._vwo_wt_l=true;_vwo_code.finish("&e=loading_failure:"+a);}})};loadWorker("https://dev.visualwebsiteoptimizer.com/cdn/edrv/worker-5a403409a4e3d10eaefb45cee4232ed5br.js");;var _vis_opt_file;var _vis_opt_lib;if(window.VWO._.allSettings.dataStore.previewExtraSettings!=undefined&&window.VWO._.allSettings.dataStore.previewExtraSettings.isSurveyPreviewMode){var surveyHash=window.VWO._.allSettings.dataStore.plugins.LIBINFO.SURVEY_DEBUG_EVENTS.HASH;var param1="evad.js?va=";var param2="&d=debugger_new";var param3="&sp=1&a=743027&sh="+surveyHash;_vis_opt_file=vwoCode.use_existing_jquery&&typeof vwoCode.use_existing_jquery()!=="undefined"?vwoCode.use_existing_jquery()?param1+"vanj"+param2:param1+"va_gq"+param2:param1+"edrv/vanj-503bbd0dc8a6cbe0edec8db01c98db71br.js"+param2;_vis_opt_file=_vis_opt_file+param3;_vis_opt_lib="https://dev.visualwebsiteoptimizer.com/dcdn/"+_vis_opt_file}else if(window.VWO._.allSettings.dataStore.mode!=undefined&&window.VWO._.allSettings.dataStore.mode=="PREVIEW"){ var path1 = 'edrv/pd_'; var path2 = window.VWO._.allSettings.dataStore.plugins.LIBINFO.EVAD.HASH + ".js"; ;_vis_opt_file=vwoCode.use_existing_jquery&&typeof vwoCode.use_existing_jquery()!=="undefined"?vwoCode.use_existing_jquery()?path1+"vanj"+path2:path1+"va_gq"+path2:path1+"edrv/vanj-503bbd0dc8a6cbe0edec8db01c98db71br.js"+path2;_vis_opt_lib="https://dev.visualwebsiteoptimizer.com/cdn/"+_vis_opt_file}else{_vis_opt_file=vwoCode.use_existing_jquery&&typeof vwoCode.use_existing_jquery()!=="undefined"?vwoCode.use_existing_jquery()?"edrv/vanj-503bbd0dc8a6cbe0edec8db01c98db71br.js":"edrv/va_gq-30a6781b4eec12f2a382ee4528e0e6b3br.js":"edrv/vanj-503bbd0dc8a6cbe0edec8db01c98db71br.js"}window._vwo_library_timer=setTimeout((function(){vwoCode.removeLoaderAndOverlay&&vwoCode.removeLoaderAndOverlay();vwoCode.finish()}),vwoCode.library_tolerance&&typeof vwoCode.library_tolerance()!=="undefined"?vwoCode.library_tolerance():2500),_vis_opt_lib=typeof _vis_opt_lib=="undefined"?window._vwo_cdn+_vis_opt_file:_vis_opt_lib;var loadLib=function(url){_vwo_code.load(url, { dSC: true, onloadCb:function(xhr,a){window._vwo_mt_l=true;if(xhr.status===200 || xhr.status===304){if(!window._vwo_wt_f)return window._vwo_mt_f=xhr.responseText;_vwo_code.addScript({text:xhr.responseText});delete window._vwo_wt_f;}else{if(gcpfb(a,loadLib,xhr.status)){return;}_vwo_code.finish("&e=loading_failure:"+a);}}, onerrorCb: function(a){if(gcpfb(a,loadLib)){return;}window._vwo_mt_l=true;_vwo_code.finish("&e=loading_failure:"+a);}})};loadLib(_vis_opt_lib);VWO.load_co=function(u,opts){return window._vwo_code.load(u,opts);};;;}}catch(e){_vwo_code.finish();_vwo_code.removeLoaderAndOverlay&&_vwo_code.removeLoaderAndOverlay();_vwo_err(e);window.VWO.caE=1}})();

Skip to page content.

Menu

English

Search

Products and services

Libraries sharing data, work and resources

Narrow by

Your selections:

Geographic region

Library segments

Clear all

Geographic region

OCLC service area

Library segments