diff --git a/webapp/grebi_api/src/main/java/uk/ac/ebi/grebi/GrebiApi.java b/webapp/grebi_api/src/main/java/uk/ac/ebi/grebi/GrebiApi.java
index df52746..157cf1d 100644
--- a/webapp/grebi_api/src/main/java/uk/ac/ebi/grebi/GrebiApi.java
+++ b/webapp/grebi_api/src/main/java/uk/ac/ebi/grebi/GrebiApi.java
@@ -99,8 +99,10 @@ static void run(
                     ctx.contentType("application/json");
                     ctx.result("{}");
 
+                    String nodeId = new String(Base64.getUrlDecoder().decode(ctx.pathParam("nodeId")));
+
                     var q = new GrebiSolrQuery();
-                    q.addFilter("grebi:nodeId", List.of(ctx.pathParam("nodeId")), SearchType.WHOLE_FIELD, false);
+                    q.addFilter("grebi:nodeId", List.of(nodeId), SearchType.WHOLE_FIELD, false);
 
                     var res = solr.getFirstNode(ctx.pathParam("subgraph"), q);
 
diff --git a/webapp/grebi_ui/src/app/util.ts b/webapp/grebi_ui/src/app/util.ts
index ea1353c..6b8c02c 100644
--- a/webapp/grebi_ui/src/app/util.ts
+++ b/webapp/grebi_ui/src/app/util.ts
@@ -54,18 +54,27 @@ export function toCamel(str: string) {
 
 
 export function pickBestDisplayName(names:string[]):string|undefined {
-  return names.slice(0).sort((a, b) => score(b) - score(a))[0]
-  function score(name) {
-    let n = 0
-    for (let c of name) {
-      if (c.match(/[A-Za-z ]/)) {
-        n++
-      } else {
-        n-=10
-      }
+  return sortDisplayNamesByReadability(names)[0]
+}
+
+export function pickWorstDisplayName(names:string[]):string|undefined {
+  return sortDisplayNamesByReadability(names).pop()
+}
+
+export function sortDisplayNamesByReadability(names:string[]):string[] {
+  return names.slice(0).sort((a, b) => readabilityScore(b) - readabilityScore(a))
+}
+
+export function readabilityScore(name:string) {
+  let n = 0
+  for (let c of name) {
+    if (c.match(/[A-Za-z ]/)) {
+      n++
+    } else {
+      n-=10
     }
-    return n
   }
+  return n
 }
 
 export function difference(a:any[], b:any[]) {
diff --git a/webapp/grebi_ui/src/components/CollapsingIdList.tsx b/webapp/grebi_ui/src/components/CollapsingIdList.tsx
new file mode 100644
index 0000000..47689c9
--- /dev/null
+++ b/webapp/grebi_ui/src/components/CollapsingIdList.tsx
@@ -0,0 +1,33 @@
+import { useState } from "react";
+import { Fragment } from "react/jsx-runtime";
+
+let MAX_IDS = 3
+
+export default function CollapsingIdList({ids}) {
+    let [ expanded, setExpanded ] = useState<boolean>(false);
+    if(ids.length > MAX_IDS && !expanded) {
+        return <div className="my-1 leading-relaxed">
+              {ids.slice(0, MAX_IDS).map(id => <Id id={id}/>)}
+              &nbsp;
+              <span
+                className="link-default italic"
+                onClick={() => setExpanded(true)}
+              >
+                + {ids.length - MAX_IDS}
+              </span>
+            </div>
+    } else {
+        return <div className="my-1 leading-relaxed">
+            {ids.map(id => <Id id={id}/>)}</div>
+    }
+
+}
+
+function Id({id}) {
+
+    return <span
+className="bg-grey-default rounded-sm font-mono py-1 px-1 mr-1 text-sm"
+>{id.value}</span>
+
+}
+
diff --git a/webapp/grebi_ui/src/components/node_edge_list/EdgesInList.tsx b/webapp/grebi_ui/src/components/node_edge_list/EdgesInList.tsx
index 36fd4d8..2808647 100644
--- a/webapp/grebi_ui/src/components/node_edge_list/EdgesInList.tsx
+++ b/webapp/grebi_ui/src/components/node_edge_list/EdgesInList.tsx
@@ -38,7 +38,7 @@ export default function EdgesInList(params:{
         async function getEdges() {
             console.log('refreshing ', node.getNodeId(), JSON.stringify(dsEnabled), JSON.stringify(edgesState?.datasources))
             setLoading(true)
-            let res = (await getPaginated<any>(`api/v1/subgraphs/${subgraph}/nodes/${node.getNodeId()}/incoming_edges?${
+            let res = (await getPaginated<any>(`api/v1/subgraphs/${subgraph}/nodes/${node.getEncodedNodeId()}/incoming_edges?${
                 new URLSearchParams([
                     ['page', page],
                     ['size', rowsPerPage],
diff --git a/webapp/grebi_ui/src/components/node_edge_list/NodeRefLink.tsx b/webapp/grebi_ui/src/components/node_edge_list/NodeRefLink.tsx
index 5966e71..27767a4 100644
--- a/webapp/grebi_ui/src/components/node_edge_list/NodeRefLink.tsx
+++ b/webapp/grebi_ui/src/components/node_edge_list/NodeRefLink.tsx
@@ -12,7 +12,7 @@ export default function NodeRefLink({
 }) {
     let type = nodeRef.extractType()
 
-    return <Link to={`/subgraphs/${subgraph}/nodes/${encodeNodeId(nodeRef.getNodeId())}`}>
+    return <Link to={`/subgraphs/${subgraph}/nodes/${nodeRef.getEncodedNodeId()}`}>
         {nodeRef.getName()}
         {type && <NodeTypeChip type={type} />}
         {/* <br/>
diff --git a/webapp/grebi_ui/src/components/node_graph_view/GraphViewCtx.tsx b/webapp/grebi_ui/src/components/node_graph_view/GraphViewCtx.tsx
index 7be0910..b3c7847 100644
--- a/webapp/grebi_ui/src/components/node_graph_view/GraphViewCtx.tsx
+++ b/webapp/grebi_ui/src/components/node_graph_view/GraphViewCtx.tsx
@@ -254,7 +254,7 @@ padding: '8px',
     async loadShallow(node:GraphNodeRef) {
 
         let [incomingEdgeFacets,outgoingEdgeFacets] = (await Promise.all([
-            getPaginated<GraphEdge>(`api/v1/subgraphs/${this.subgraph}/nodes/${node.getNodeId()}/incoming_edges?` +
+            getPaginated<GraphEdge>(`api/v1/subgraphs/${this.subgraph}/nodes/${node.getEncodedNodeId()}/incoming_edges?` +
                 new URLSearchParams([
                     ['size', '1'],
                     ['facet', 'grebi:type'],
@@ -262,7 +262,7 @@ padding: '8px',
                     ...Array.from(this.dsExclude).map(ds => ['-grebi:datasources', ds])
                 ] as any)
             ),
-            getPaginated<GraphEdge>(`api/v1/subgraphs/${this.subgraph}/nodes/${node.getNodeId()}/outgoing_edges?` +
+            getPaginated<GraphEdge>(`api/v1/subgraphs/${this.subgraph}/nodes/${node.getEncodedNodeId()}/outgoing_edges?` +
                 new URLSearchParams([
                     ['size', '1'],
                     ['facet', 'grebi:type'],
diff --git a/webapp/grebi_ui/src/frontends/ebi/pages/EbiNodePage.tsx b/webapp/grebi_ui/src/frontends/ebi/pages/EbiNodePage.tsx
index 13e136a..e517316 100644
--- a/webapp/grebi_ui/src/frontends/ebi/pages/EbiNodePage.tsx
+++ b/webapp/grebi_ui/src/frontends/ebi/pages/EbiNodePage.tsx
@@ -19,6 +19,7 @@ import PropTable from "../../../components/node_prop_table/PropTable";
 import SearchBox from "../../../components/SearchBox";
 import GraphNode from "../../../model/GraphNode";
 import { get, getPaginated } from "../../../app/api";
+import encodeNodeId from "../../../encodeNodeId";
 
 
 export default function EbiNodePage() {
@@ -33,7 +34,7 @@ export default function EbiNodePage() {
 
   useEffect(() => {
     async function getNode() {
-      let graphNode = new GraphNode(await get<any>(`api/v1/subgraphs/${subgraph}/nodes/${nodeId}?lang=${lang}`))
+      let graphNode = new GraphNode(await get<any>(`api/v1/subgraphs/${subgraph}/nodes/${encodeNodeId(nodeId)}?lang=${lang}`))
       setNode(graphNode)
     }
     getNode()
@@ -61,9 +62,9 @@ export default function EbiNodePage() {
         <div className="text-center">
         <Typography variant="h5">{pageTitle} {
           node.extractType()?.long && <span style={{textTransform:'uppercase', fontVariant:'small-caps',fontWeight:'bold',fontSize:'small',verticalAlign:'middle',marginLeft:'12px'}}>{node.extractType()?.long}</span>}</Typography>
-                      <Grid item xs={10} className="pt-2">
-                {props['id'].map(id => <span
-className="bg-grey-default rounded-sm font-mono py-1 pl-2 ml-1 my-1 mb-2 text-sm"
+                      <div>
+                {node.getSourceIds().map(id => <span
+className="bg-grey-default rounded-sm font-mono py-1 pl-2 ml-1 my-2 text-sm"
 >{id.value}
 <button
                     onClick={() => {
@@ -74,7 +75,7 @@ className="bg-grey-default rounded-sm font-mono py-1 pl-2 ml-1 my-1 mb-2 text-sm
                     <i className="icon icon-common icon-copy icon-spacer" />
                   </button>
 </span>)}
-              </Grid>
+              </div>
           </div>
         <Typography>{pageDesc}</Typography>
         <Grid container spacing={1} direction="row">
diff --git a/webapp/grebi_ui/src/frontends/ebi/pages/EbiSearchPage.tsx b/webapp/grebi_ui/src/frontends/ebi/pages/EbiSearchPage.tsx
index f7c1074..07d8a2e 100644
--- a/webapp/grebi_ui/src/frontends/ebi/pages/EbiSearchPage.tsx
+++ b/webapp/grebi_ui/src/frontends/ebi/pages/EbiSearchPage.tsx
@@ -9,6 +9,7 @@ import LoadingOverlay from "../../../components/LoadingOverlay";
 import SearchBox from "../../../components/SearchBox";
 import GraphNode from "../../../model/GraphNode";
 import EbiHeader from "../EbiHeader";
+import CollapsingIdList from "../../../components/CollapsingIdList";
 
 export default function EbiSearchPage() {
   const [searchParams] = useSearchParams();
@@ -334,11 +335,7 @@ export default function EbiSearchPage() {
                     }
             <DatasourceTags dss={graphNode.getDatasources()} />
                     </div>
-                      <div className="my-1 leading-relaxed">
-                {graphNode.getIds().map(id => <span
-className="bg-grey-default rounded-sm font-mono py-1 px-1 mr-1 text-sm"
->{id.value}</span>)}
-                      </div>
+                    <CollapsingIdList ids={graphNode.getSourceIds()} />
                       {graphNode.getDescription() && (
                       <div className="my-1 leading-relaxed">
                         {graphNode.getDescription()}
diff --git a/webapp/grebi_ui/src/frontends/exposomekg/pages/EkgSearchPage.tsx b/webapp/grebi_ui/src/frontends/exposomekg/pages/EkgSearchPage.tsx
index 6a6d11f..a89b817 100644
--- a/webapp/grebi_ui/src/frontends/exposomekg/pages/EkgSearchPage.tsx
+++ b/webapp/grebi_ui/src/frontends/exposomekg/pages/EkgSearchPage.tsx
@@ -335,7 +335,7 @@ export default function EbiSearchPage() {
             <DatasourceTags dss={graphNode.getDatasources()} />
                     </div>
                       <div className="my-1 leading-relaxed">
-                {graphNode.getIds().map(id => <span
+                {graphNode.getSourceIds().map(id => <span
 className="bg-grey-default rounded-sm font-mono py-1 px-1 mr-1 text-sm"
 >{id.value}</span>)}
                       </div>
diff --git a/webapp/grebi_ui/src/model/GraphNode.ts b/webapp/grebi_ui/src/model/GraphNode.ts
index b402d33..3b6ce04 100644
--- a/webapp/grebi_ui/src/model/GraphNode.ts
+++ b/webapp/grebi_ui/src/model/GraphNode.ts
@@ -36,7 +36,7 @@ export default class GraphNode extends GraphNodeRef {
         let allIdentifiers = [
             ...this.getNames().map(p => p.value),
             ...this.getSynonyms().map(p => p.value),
-            ...this.getIds().map(p => p.value),
+            ...this.getSourceIds().map(p => p.value),
         ];
         return allIdentifiers.indexOf(q) !== -1
     }
diff --git a/webapp/grebi_ui/src/model/GraphNodeRef.ts b/webapp/grebi_ui/src/model/GraphNodeRef.ts
index b1a3267..fd8ed80 100644
--- a/webapp/grebi_ui/src/model/GraphNodeRef.ts
+++ b/webapp/grebi_ui/src/model/GraphNodeRef.ts
@@ -1,6 +1,7 @@
 
 import PropVal from "./PropVal";
-import { pickBestDisplayName } from "../app/util";
+import { pickBestDisplayName, pickWorstDisplayName, readabilityScore } from "../app/util";
+import encodeNodeId from "../encodeNodeId";
 
 export default class GraphNodeRef {
 
@@ -14,6 +15,10 @@ export default class GraphNodeRef {
         return this.props['grebi:nodeId']
     }
 
+    getEncodedNodeId():string {
+        return encodeNodeId(this.props['grebi:nodeId'])
+    }
+
     getDatasources():string[] {
         var ds = this.props['grebi:datasources'] || []
         ds.sort((a, b) => a.localeCompare(b) + (a.startsWith("OLS.") ? 10000 : 0) + (b.startsWith("OLS.") ? -10000 : 0))
@@ -39,8 +44,32 @@ export default class GraphNodeRef {
         return this.props['grebi:type']
     }
 
-    getIds():PropVal[] {
-        return PropVal.arrFrom(this.props['id'])
+    getSourceIds():PropVal[] {
+        let sids:PropVal[] = PropVal.arrFrom(this.props['grebi:sourceIds'])
+
+        // this sort order will ultimately be used in display
+        // ideally we will see one ID from each datasource at the beginning
+        // to give an idea of how many sources; and also we prefer numeric
+        // identifiers since this is explicitly supposed to be identifiers and
+        // will probably be displayed next to the readable name.
+
+        let res:PropVal[] = []
+
+        for(let ds of this.getDatasources()) {
+            let matches = sids.filter(sid => sid.datasources.indexOf(ds) !== -1)
+            if(matches.length > 0) {
+                res.push(matches.sort((a, b) => { return numericScore(b.value) - numericScore(a.value) })[0])
+            }
+        }
+
+        let remainder = sids.filter(sid => res.indexOf(sid) === -1)
+        remainder.sort((a, b) => { return numericScore(b.value) - numericScore(a.value) })
+
+        return [...res, ...remainder]
+
+        function numericScore(s:string):number {
+            return [...s].filter(c => c.match(/[0-9]/)).length
+        }
     }