diff --git a/frontend/src/global/hbsPartials.ts b/frontend/src/global/hbsPartials.ts
new file mode 100644
index 00000000..6fe5815c
--- /dev/null
+++ b/frontend/src/global/hbsPartials.ts
@@ -0,0 +1,5 @@
+import Handlebars from 'handlebars/dist/handlebars.runtime';
+
+import sparqlPreamble from '../sparql/query-templates/preamble-template';
+
+Handlebars.registerPartial('sparqlPreamble', sparqlPreamble);
diff --git a/frontend/src/main.ts b/frontend/src/main.ts
index 97666892..5e48ff2d 100644
--- a/frontend/src/main.ts
+++ b/frontend/src/main.ts
@@ -7,6 +7,7 @@ import './global/scroll-easings';
 import { i18nPromise } from './global/i18n';
 import './global/internalLinks';
 import './global/hbsHelpers';
+import './global/hbsPartials';
 import user from './global/user';
 import { prefetch } from './global/ld-store';
 import './global/item-cache';
diff --git a/frontend/src/sparql/query-templates/items-for-source-template.hbs b/frontend/src/sparql/query-templates/items-for-source-template.hbs
index a9ee0641..4310b434 100644
--- a/frontend/src/sparql/query-templates/items-for-source-template.hbs
+++ b/frontend/src/sparql/query-templates/items-for-source-template.hbs
@@ -1,6 +1,4 @@
-{{#each namespaces}}
-PREFIX {{label}}: <{{prefix}}>
-{{/each}}
+{{>sparqlPreamble}}
 PREFIX schema: <http://schema.org/>
 PREFIX oa: <http://www.w3.org/ns/oa#>
 CONSTRUCT {
diff --git a/frontend/src/sparql/query-templates/preamble-template.hbs b/frontend/src/sparql/query-templates/preamble-template.hbs
new file mode 100644
index 00000000..20cdbc82
--- /dev/null
+++ b/frontend/src/sparql/query-templates/preamble-template.hbs
@@ -0,0 +1,3 @@
+{{#each namespaces}}
+PREFIX {{label}}: <{{prefix}}>
+{{/each}}
diff --git a/frontend/src/test-util.ts b/frontend/src/test-util.ts
index afbc8bdb..5f0ca6bd 100644
--- a/frontend/src/test-util.ts
+++ b/frontend/src/test-util.ts
@@ -6,6 +6,7 @@ import { Events } from 'backbone';
 
 import Store from './common-rdf/store';
 import './global/hbsHelpers';
+import './global/hbsPartials';
 import { i18nPromise } from './global/i18n';
 
 /**