diff --git a/packages/app/src/lib/components/error-summary.js b/packages/app/src/lib/components/error-summary.js
index af4acbd..2021d91 100644
--- a/packages/app/src/lib/components/error-summary.js
+++ b/packages/app/src/lib/components/error-summary.js
@@ -25,13 +25,13 @@ function renderSummary({ focusNodes, ...top }, customPrefixes) {
       ${[...focusNodes].map(
         ([focusNode, { properties, errors }]) => html`
           <li>
-            ${focusNode.value}:
+            ${shrink(focusNode.value, customPrefixes) || focusNode.value}:
             <ul>
               ${errors.map(renderResult)}
               ${[...properties].map(
                 ([property, messages]) => html`
                   <li>
-                    ${shrink(property.value, customPrefixes) == "" ? property.value : shrink(property.value, customPrefixes)}:
+                    ${shrink(property.value, customPrefixes) || property.value}:
                     <ul>
                       ${messages.map(renderResult)}
                     </ul>
diff --git a/yarn.lock b/yarn.lock
index cbd95d9..53ca59b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1683,7 +1683,7 @@
   resolved "https://registry.yarnpkg.com/@webcomponents/shadycss/-/shadycss-1.11.1.tgz#add19d5e0db4a014e143d2278921347dcd8f0a55"
   integrity sha512-qSok/oMynEgS99wFY5fKT6cR1y64i01RkHGYOspkh2JQsLSM8pjciER+gu3fqTx589y/7LoSuyB5G9Rh7dyXaQ==
 
-"@zazuko/rdf-vocabularies@>=2023.01.17":
+"@zazuko/rdf-vocabularies@>=2023.01.17", "@zazuko/rdf-vocabularies@^2023.1.19":
   version "2023.1.19"
   resolved "https://registry.yarnpkg.com/@zazuko/rdf-vocabularies/-/rdf-vocabularies-2023.1.19.tgz#545da0172b5963a7dea4e1cb9942e312c2724577"
   integrity sha512-/vC/Ok8etIi4kflbOAoRr9JV95auJaUREV9lrWP3wDEMfhu8jVYogwi/OD1yA2pH6KIYPS2+z7LN1jxOe3G56g==
@@ -1695,18 +1695,6 @@
     readable-stream "^3.6.0"
     string-to-stream "^3.0.1"
 
-"@zazuko/rdf-vocabularies@^2021.3.31":
-  version "2021.9.22"
-  resolved "https://registry.yarnpkg.com/@zazuko/rdf-vocabularies/-/rdf-vocabularies-2021.9.22.tgz#6d342e663e2a1104f7a53c5ccb3da5b2167850eb"
-  integrity sha512-BHiNfex7Apt0EibtLHrPYv9dimYtsWZfVBKHtv4s58EtONwW2cLODUC8HFrlwre5G4EDq5gDehEHTjWCPFReHw==
-  dependencies:
-    "@rdfjs/parser-n3" "^1.1.4"
-    commander "^5.0.0"
-    pkg-dir "^5.0.0"
-    rdf-ext "^1.3.1"
-    readable-stream "^3.6.0"
-    string-to-stream "^3.0.1"
-
 "@zazuko/s@^1.0.0":
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/@zazuko/s/-/s-1.0.0.tgz#dc07617676af9f00f3a93e78224c969584ce0b4b"
@@ -4755,7 +4743,7 @@ rdf-data-factory@^1.1.0:
   dependencies:
     "@rdfjs/types" "*"
 
-rdf-ext@^1.3.1, rdf-ext@^1.3.5:
+rdf-ext@^1.3.5:
   version "1.3.5"
   resolved "https://registry.yarnpkg.com/rdf-ext/-/rdf-ext-1.3.5.tgz#89706abec64657d744b478d3a33d40fe5a6aa249"
   integrity sha512-LS/waItwp5aGY9Ay7y147HxWLIaSvw4r172S995aGwVkvg0KwUA0NY8w61p/LoFdQ4V6mzxQdVoRN6x/6OaK0w==