diff --git a/src/dsp_tools/models/value.py b/src/dsp_tools/models/value.py
index 96fe1acfa..f6d3509fe 100644
--- a/src/dsp_tools/models/value.py
+++ b/src/dsp_tools/models/value.py
@@ -15,7 +15,6 @@
 class KnoraStandoffXml:
     """Used to handle XML strings for standoff markup"""
 
-    __iriregexp = regex.compile(r"IRI:[^:]*:IRI")
     __xmlstr: str
 
     def __init__(self, xmlstr: str) -> None:
@@ -24,9 +23,6 @@ def __init__(self, xmlstr: str) -> None:
     def __str__(self) -> str:
         return self.__xmlstr
 
-    def get_all_iris(self) -> Optional[list[str]]:
-        return self.__iriregexp.findall(self.__xmlstr)
-
     def find_ids_referenced_in_salsah_links(self) -> set[str]:
         return set(regex.findall(pattern='href="IRI:(.*?):IRI"', string=self.__xmlstr))
 
diff --git a/src/dsp_tools/models/xmlresource.py b/src/dsp_tools/models/xmlresource.py
index 6582e9900..3f6b894bc 100644
--- a/src/dsp_tools/models/xmlresource.py
+++ b/src/dsp_tools/models/xmlresource.py
@@ -146,16 +146,15 @@ def get_propvals(
                         v = value.value  # if we do not find the id, we assume it's a valid DSP IRI
                 elif prop.valtype == "text":
                     if isinstance(value.value, KnoraStandoffXml):
-                        iri_refs = value.value.get_all_iris()
-                        for iri_ref in iri_refs or []:
-                            res_id = iri_ref.split(":")[1]
+                        res_ids = value.value.find_ids_referenced_in_salsah_links()
+                        for res_id in res_ids:
                             iri = resiri_lookup.get(res_id)
                             if not iri:
                                 raise BaseError(
                                     f"Resource '{self.id}' cannot be created, because it contains a salsah-Link to "
                                     f"the following invalid resource: '{res_id}'"
                                 )
-                            value.value.replace(iri_ref, iri)
+                            value.value.replace(f"IRI:{res_id}:IRI", iri)
                     v = value.value
                 else:
                     v = value.value
diff --git a/src/dsp_tools/models/xmlvalue.py b/src/dsp_tools/models/xmlvalue.py
index 39ad1e492..eab8ed5ec 100644
--- a/src/dsp_tools/models/xmlvalue.py
+++ b/src/dsp_tools/models/xmlvalue.py
@@ -27,7 +27,7 @@ def __init__(
             xmlstr_orig = etree.tostring(node, encoding="unicode", method="xml")
             xmlstr_cleaned = self._cleanup_formatted_text(xmlstr_orig)
             self.value = KnoraStandoffXml(xmlstr_cleaned)
-            self.resrefs = list({x.split(":")[1] for x in self.value.get_all_iris() or []})
+            self.resrefs = list(self.value.find_ids_referenced_in_salsah_links())
         elif val_type == "text" and node.get("encoding") == "utf8":
             str_orig = "".join(node.itertext())
             str_cleaned = self._cleanup_unformatted_text(str_orig)