diff --git a/officina/.gitignore b/officina/.gitignore
index 983029c..adf93e1 100644
--- a/officina/.gitignore
+++ b/officina/.gitignore
@@ -25,6 +25,7 @@ node_modules
 !999999/0/.gitkeep
 !999999999/1568346/*
 catalog-v001.xml
+!catalog-v003.xml
 MDCIII.devel.owl
 *.devel.owl
 *.devel.owl.ttl
diff --git a/officina/1603/1/1603/.gitkeep b/officina/1603/1/1603/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/officina/MDCIII.owl b/officina/1603/1/1603/1603_1_1603.owl
similarity index 99%
rename from officina/MDCIII.owl
rename to officina/1603/1/1603/1603_1_1603.owl
index 8d7d42a..cd54085 100644
--- a/officina/MDCIII.owl
+++ b/officina/1603/1/1603/1603_1_1603.owl
@@ -9,8 +9,7 @@
      xmlns:xsd="http://www.w3.org/2001/XMLSchema#"
      xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
      xmlns:skos="http://www.w3.org/2004/02/skos/core#">
-    <owl:Ontology rdf:about="urn:mdciii">
-        <owl:versionIRI rdf:resource="https://github.com/EticaAI/lexicographi-sine-finibus/blob/main/officina/MDCIII.owl"/>
+    <owl:Ontology rdf:about="urn:mdciii:1603:1:1603[]">
         <rdfs:comment xml:lang="en">Work in progress</rdfs:comment>
     </owl:Ontology>
     
@@ -2147,4 +2146,3 @@
 
 
 <!-- Generated by the OWL API (version 4.5.9.2019-02-01T07:24:44Z) https://github.com/owlcs/owlapi -->
-
diff --git a/officina/999999999/0/1603_1.py b/officina/999999999/0/1603_1.py
index 7027d72..c249b80 100755
--- a/officina/999999999/0/1603_1.py
+++ b/officina/999999999/0/1603_1.py
@@ -156,6 +156,10 @@
 --data-apothecae-ex='1603_45_1,1603_45_31' \
 --data-apothecae-ad='apothecae.datapackage.json'
 
+    {0} --methodus='data-apothecae' \
+--data-apothecae-ex='1603_1_1,1603_1_51' \
+--data-apothecae-ad='999999/0/catalog-v001.xml'
+
     {0} --methodus='data-apothecae' \
 --data-apothecae-ex='1603_45_1,1603_45_31' \
 --data-apothecae-ad='apothecae.sqlite'
@@ -4025,6 +4029,8 @@ def __init__(
                 self.data_apothecae_formato = 'sqlite'
             elif data_apothecae_ad.endswith('.json'):
                 self.data_apothecae_formato = 'datapackage'
+            elif data_apothecae_ad.endswith('.xml'):
+                self.data_apothecae_formato = 'catalog_v001'
             else:
                 raise ValueError('--data-apothecae-formato ?')
 
@@ -4062,12 +4068,102 @@ def praeparatio(self):
         if self.data_apothecae_formato == 'datapackage':
             # return self.praeparatio_datapackage(libraria)
             return self.praeparatio_datapackage()
+
+        if self.data_apothecae_formato == 'catalog_v001':
+            # return self.praeparatio_datapackage(libraria)
+            return self.praeparatio_catalog_v001()
+
         if self.data_apothecae_formato == 'sqlite':
             # return self.praeparatio_sqlite(libraria)
             return self.praeparatio_sqlite()
 
         return True
 
+    def praeparatio_catalog_v001(
+            self,
+            temporarium: str = None):
+        """praeparatio_catalog_v001 _summary_
+
+        A Protege-like catalog-v001.xml file syntax
+
+        Specification:
+            - https://en.wikipedia.org/wiki/XML_catalog
+            - www.oasis-open.org/committees/download.php/14810/xml-catalogs.pdf
+            - https://datatracker.ietf.org/doc/html/rfc3986#section-3.4
+
+        Examples:
+            - https://github.com/EnvironmentOntology
+              /environmental-exposure-ontology/blob/v2022-05-12/catalog-v001.xml
+            - https://github.com/w3c-lbd-cg/opm/blob/master/catalog-v001.xml
+
+        See also:
+            - http://www.stylusstudio.com/super-catalogs.html
+            - https://norman.walsh.name/2003/06/05/xmlcatalogs
+            - https://norman.walsh.name/2003/06/26/cache
+
+        Args:
+            temporarium (str, optional): _description_. Defaults to None.
+        """
+        paginae = [
+            '<?xml version="1.0" encoding="UTF-8" standalone="no"?>',
+            '<catalog prefer="public" '
+            'xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog">'
+        ]
+
+        # raise ValueError("TODO")
+
+        # if bool(DATA_APOTHECAE_MINIMIS) is True:
+
+        for codex in self.data_apothecae_ex:
+            codex__under = numerordinatio_neo_separatum(codex, '_')
+            codex__path = numerordinatio_neo_separatum(codex, '/')
+            codex__norm = numerordinatio_neo_separatum(codex, ':')
+            ontologia_ex_archivo_basi = '{0}/{1}'.format(
+                codex__path, codex__under,
+            )
+            # print(ontologia_ex_archivo_basi + '.no11.tm.hxl.csv')
+            if exists(ontologia_ex_archivo_basi + '.no11.owl.ttl'):
+                paginae.append(
+                    '    <uri id="_{0}_" name="urn:mdciii:{2}?t=owl"'
+                    ' uri="{1}/{0}.no11.owl.ttl"/>'.format(
+                        codex__under, codex__path, codex__norm
+                    ))
+            elif exists(ontologia_ex_archivo_basi + '.no1.owl.ttl'):
+                paginae.append(
+                    '    <uri id="_{0}_" name="urn:mdciii:{2}?t=owl"'
+                    ' uri="{1}/{0}.no1.owl.ttl"/>'.format(
+                        codex__under, codex__path, codex__norm
+                    ))
+
+            if exists(ontologia_ex_archivo_basi + '.no11.skos.ttl'):
+                paginae.append(
+                    '    <uri id="_{0}_" name="urn:mdciii:{2}?t=owl"'
+                    ' uri="{1}/{0}.no11.skos.ttl"/>'.format(
+                        codex__under, codex__path, codex__norm
+                    ))
+            elif exists(ontologia_ex_archivo_basi + '.no1.skos.ttl'):
+                paginae.append(
+                    '    <uri id="_{0}_" name="urn:mdciii:{2}?t=skos"'
+                    ' uri="{1}/{0}.no1.skos.ttl"/>'.format(
+                        codex__under, codex__path, codex__norm
+                    ))
+
+        paginae.append('</catalog>')
+
+        if temporarium:
+            with open(temporarium, 'w') as archivum:
+                for lineam in paginae:
+                    archivum.write(lineam + "\n")
+        else:
+            _path_archivum = NUMERORDINATIO_BASIM + '/' + self.data_apothecae_ad
+            # self.resultatum.append('TODO praeparatio_datapackage')
+            self.resultatum.append(_path_archivum)
+
+            with open(_path_archivum, 'w') as archivum:
+                # Further file processing goes here
+                for lineam in paginae:
+                    archivum.write(lineam + "\n")
+
     def praeparatio_datapackage(
             self,
             temporarium: str = None):
diff --git a/officina/catalog-v003.xml b/officina/catalog-v003.xml
new file mode 100644
index 0000000..306a95a
--- /dev/null
+++ b/officina/catalog-v003.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<catalog prefer="public" xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog">
+    <uri id="_1603_1_1603_" name="urn:mdciii:1603:1:1603[]" uri="1603/1/1603/1603_1_1603.owl"/>
+</catalog>