added (incomplete) ref to ABZ paper

Isabelle_DOF/document/root.bib

@@ -73,6 +73,33 @@
   public	= {yes}
 }
 
+@InCollection{	  brucker.ea:deep-ontologies:2023,
+  author	= {Achim D. Brucker and Idir Ait-Sadoune and Nicolas Meric and Burkhart Wolff},
+  booktitle	= {9th International Conference on Rigorous State-Based Methods (ABZ 2023)},
+  language	= {USenglish},
+  publisher	= {Springer-Verlag},
+  address	= {Heidelberg},
+  series	= {Lecture Notes in Computer Science},
+  number	= {XXXXX},
+  title		= {{U}sing {D}eep {O}ntologies in {F}ormal {S}oftware {E}ngineering},
+  year    = {2023},
+  abstract = {Isabelle/DOF is an ontology framework on top of Isabelle Isabelle/DOF allows for the 
+              formal development of ontologies as well as continuous conformity-checking of 
+              integrated documents annotated by ontological data. An integrated document may 
+              contain text, code, definitions, proofs and user-programmed constructs supporting a 
+              wide range of Formal Methods. Isabelle/DOF is designed to leverage traceability in  
+              integrated documents by supporting navigation in Isabelle’s IDE as well as the 
+              document generation process.
+                 In this paper we extend Isabelle/DOF with annotations of terms, a pervasive 
+              data-structure underlying Isabelle used to syntactically rep- resent expressions 
+              and formulas. Rather than introducing an own pro- gramming language for meta-data, 
+              we use Higher-order Logic (HOL) for expressions, data-constraints, ontological 
+              invariants, and queries via code-generation and reflection. This allows both for 
+              powerful query languages and logical reasoning over ontologies in, for example, 
+              ontological mappings. Our application examples cover documents targeting formal 
+              certifications such as CENELEC, Common Criteria, etc.}
+}
+
 @InCollection{	  brucker.ea:isabelle-ontologies:2018,
   abstract	= {While Isabelle is mostly known as part of Isabelle/HOL (an
 		  interactive theorem prover), it actually provides a