diff --git a/config-sample.yaml b/config-sample.yaml
index 4dc1826..b9e9e80 100644
--- a/config-sample.yaml
+++ b/config-sample.yaml
@@ -209,7 +209,9 @@ oai:
             defaultLang: en
             # Path to the directory storing CMDI XML templates
             templateDir: src/acdhOeaw/oai/metadata/liveCmdi
-            # Metadata property prividng the CMDI schema to be used for a given resource
+            # Metadata property providng the CMDI schema to be used for a given resource
+            # The schema is converted to a template filename by replacing all characters out of [-A-Za-z0-9_]
+            # to an underscore and appending .xml at the end (e.g. http://foo.bar/baz becomes http___foo_bar_baz.xml)
             schemaProp: http://can.not.be.overwritten
             # Namespace prefixes used in template file's metadata property placeholders
             propNmsp:
@@ -218,7 +220,7 @@ oai:
             idNmsp:
                 id: https://id.acdh.oeaw.ac.at/
                 cmdiid: https://id.acdh.oeaw.ac.at/cmdi/
-            # Default CMDI schema to be used when a resource doesn't have the `schemaProp` metadatada property or it points to a schema without a tempalte
+            # Default CMDI schema to be used when a resource doesn't have the `schemaProp` metadatada property or it points to a schema without a template
             schemaDefault: kulturpool
             # Handle only resources having `schemaProp` metadata property value equal to the `schemaEnforce` value.
             schemaEnforce: ""
diff --git a/src/acdhOeaw/arche/oaipmh/metadata/LiveCmdiMetadata.php b/src/acdhOeaw/arche/oaipmh/metadata/LiveCmdiMetadata.php
index 8593de7..3c55c42 100644
--- a/src/acdhOeaw/arche/oaipmh/metadata/LiveCmdiMetadata.php
+++ b/src/acdhOeaw/arche/oaipmh/metadata/LiveCmdiMetadata.php
@@ -190,7 +190,7 @@ public function __construct(RepoResourceDb $resource,
 
         $formats = $this->res->getGraph()->all($this->format->schemaProp);
         foreach ($formats as $i) {
-            $i    = preg_replace('|^.*(clarin.eu:[^/]+).*$|', '\\1', (string) $i);
+            $i    = preg_replace('|[^-A-Za-z0-9_]|', '_', (string) $i);
             $path = $this->format->templateDir . '/' . $i . '.xml';
             if (file_exists($path)) {
                 $this->template = $path;
@@ -198,9 +198,10 @@ public function __construct(RepoResourceDb $resource,
             }
         }
         if ($this->template === null && !empty($this->format->schemaDefault)) {
-            $this->template = $this->format->templateDir . '/' . $this->format->schemaDefault . '.xml';
+            $default = preg_replace('|[^-A-Za-z0-9_]|', '_', $this->format->schemaDefault);
+            $this->template = $this->format->templateDir . '/' . $default . '.xml';
         }
-        if (empty($this->template)) {
+        if (empty($this->template) || !file_exists($this->template)) {
             throw new RuntimeException('No CMDI template matched');
         }