diff --git a/.hermit_ok b/.hermit_ok
new file mode 100644
index 0000000..7763f6a
--- /dev/null
+++ b/.hermit_ok
@@ -0,0 +1,2 @@
+Classes equivalent to 'owl:Nothing':
+	owl:Nothing
diff --git a/.travis.yml b/.travis.yml
index c91c8f2..9f48af3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,5 +3,13 @@ python:
   - "2.7"
 # command to install dependencies
 install: "pip install git+https://github.com/edamontology/edamxpathvalidator.git"
+addons:
+  apt:
+    packages:
+      - oracle-java8-installer
+# install dependencies for owltools checker
+before_script:
+  - sudo update-java-alternatives -s java-8-oracle
+  - wget http://www.hermit-reasoner.com/download/current/HermiT.zip && unzip -o -d . HermiT.zip HermiT.jar
 # command to run tests
-script: "edamxpathvalidator EDAM_dev.owl" 
+script: "edamxpathvalidator EDAM_dev.owl && java -jar HermiT.jar -U EDAM_dev.owl  | diff .hermit_ok -" 
diff --git a/EDAM_dev.owl b/EDAM_dev.owl
index 9ec137d..b790669 100644
--- a/EDAM_dev.owl
+++ b/EDAM_dev.owl
@@ -942,7 +942,6 @@
             </owl:Restriction>
         </rdfs:subClassOf>
         <owl:disjointWith rdf:resource="http://edamontology.org/data_2048"/>
-        <owl:disjointWith rdf:resource="http://edamontology.org/data_2527"/>
         <rdfs:seeAlso>http://semanticscience.org/resource/SIO_000115</rdfs:seeAlso>
         <created_in>beta12orEarlier</created_in>
         <oboInOwl:hasExactSynonym>ID</oboInOwl:hasExactSynonym>
@@ -31941,10 +31940,10 @@
     <owl:Class rdf:about="http://edamontology.org/format_3590">
         <rdfs:label>hdf5</rdfs:label>
         <rdfs:subClassOf rdf:resource="http://edamontology.org/format_2333"/>
-        <rdfs:comment>An HDF5 file appears to the user as a directed graph. The nodes of this graph are the higher-level HDF5 objects that are exposed by the HDF5 APIs: Groups, Datasets, Named datatypes. H5py uses straightforward NumPy and Python metaphors, like dictionary and NumPy array syntax.</rdfs:comment>
+        <rdfs:comment>An HDF5 file appears to the user as a directed graph. The nodes of this graph are the higher-level HDF5 objects that are exposed by the HDF5 APIs: Groups, Datasets, Named datatypes.</rdfs:comment>
         <created_in>1.11</created_in>
         <oboInOwl:hasExactSynonym>h5</oboInOwl:hasExactSynonym>
-        <oboInOwl:hasDefinition>Binary format used by Galaxy for hierarchical data.</oboInOwl:hasDefinition>
+        <oboInOwl:hasDefinition>HDF5 is a generic hierarchical data file format used to store and organize large amounts of data.</oboInOwl:hasDefinition>
         <oboInOwl:inSubset rdf:resource="&oboOther;edam#edam"/>
         <oboInOwl:inSubset rdf:resource="&oboOther;edam#formats"/>
         <oboInOwl:hasDbXref rdf:resource="https://www.hdfgroup.org/HDF5/doc/H5.format.html"/>
@@ -32433,7 +32432,7 @@
     <!-- http://edamontology.org/format_3621 -->
 
     <owl:Class rdf:about="http://edamontology.org/format_3621">
-        <rdfs:label>SQLite</rdfs:label>
+        <rdfs:label>SQLite format</rdfs:label>
         <rdfs:subClassOf rdf:resource="http://edamontology.org/format_2333"/>
         <documentation>https://www.sqlite.org/fileformat2.html</documentation>
         <oboInOwl:hasDefinition>Data format used by the SQLite database.</oboInOwl:hasDefinition>
@@ -32447,8 +32446,9 @@
     <!-- http://edamontology.org/format_3622 -->
 
     <owl:Class rdf:about="http://edamontology.org/format_3622">
-        <rdfs:label>GeminiSQLite</rdfs:label>
-        <rdfs:subClassOf rdf:resource="http://edamontology.org/format_2333"/>
+        <rdfs:label>Gemini SQLite format</rdfs:label>
+        <rdfs:subClassOf rdf:resource="http://edamontology.org/format_3621"/>
+        <rdfs:subClassOf rdf:resource="http://edamontology.org/format_2921"/>
         <documentation>https://gemini.readthedocs.org/en/latest/content/quick_start.html</documentation>
         <created_in>1.11</created_in>
         <oboInOwl:hasDefinition>Data format used by the SQLite database conformant to the Gemini schema.</oboInOwl:hasDefinition>
@@ -44017,7 +44017,6 @@ Trim sequences (typically from an automated DNA sequencer) to remove sequence-sp
 
     <owl:Class rdf:about="http://edamontology.org/operation_3200">
         <rdfs:label>Community profiling</rdfs:label>
-        <rdfs:subClassOf rdf:resource="http://edamontology.org/data_1872"/>
         <rdfs:subClassOf rdf:resource="http://edamontology.org/operation_2478"/>
         <oboInOwl:hasDefinition>Analyse DNA sequences in order to identify a DNA &apos;barcode&apos;; marker genes or any short fragment(s) of DNA that are useful to diagnose the taxa of biological organisms.</oboInOwl:hasDefinition>
         <created_in>1.1</created_in>
diff --git a/changelog.md b/changelog.md
index fd0112c..a0b1bba 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,28 +1,42 @@
 # Changelog for EDAM
-Description of changes are grouped as follows:
-* **Added:** new features
-* **Changed:** changes to existing functionality
-* **Deprecated:** a once-stable feature that has been removed
-* **Removed:** a deprecated feature that has been removed
-* **Fixed:** a bug fix
-* **Misc:** some miscellaneous other change
+Descriptions of changes are grouped as follows:
+* **Added:** new concepts or features
+* **Changed:** changes to existing concepts and features
+* **Deprecated:** once-stable concepts or features that became obsolete
+* **Removed:** deprecated concepts or features that have been removed
+* **Fixed:** fixed bugs, issues, corrected concepts and features
+* **Misc:** miscellaneous other changes
 
 # EDAM\_1.15.owl
 See the [detailed change log](https://github.com/edamontology/edamontology/blob/master/changelog-detailed.md) for exact details of changes.
 
-EDAM\_15 includes:
-* new terms or corrections requested by the community, especially to add new formats
-  and synonym cleanups
+EDAM\_1.15 includes:
+* new concepts and terms requested by the community, including ones for environmental omics and biodiversity
+* structural improvements and fixes, including a clean-up of synonyms (automation of this in the pipeline), updates of formats, and simplification of _Visualisation_ concepts
 
 ## Added
-* 24 concepts changed
+* 20 concepts added  (9 Data, 6 Operation, 5 Format)
 
 ## Changed
-* 20 concepts added, mainly formats.
+* 24 concepts changed (9 Data, 5 Format, 9 Operation, 1 Topic)
+* Added citations, media types, and/or file extensions of some Format concepts
+* Added and/or cleaned-up synonyms of various concepts
 
 ## Deprecated
-* 5 concepts deprecated
+* 5 concepts deprecated (2 Data, 3 Operation)
 
+## Fixed
+* 26 issues fixed and closed (#119, #121, #130, #131, #132, #133, #134, #135, #136, #141, #142, #144, #145, #146, #150, #151, #152, #156, #157, #158, #159, #160, #165, #168, #169, #172)
+* 3 issues fixed and left open for eventual further discussion (#120, #143, #166)
+
+## Misc
+* 1 invalid issue closed (#149)
+* 2 issues closed, wrong project (#153, #154)
+* 4 issues closed, won't fix (#125, #147, #148, #155)
+* 2 other issues closed (#124, #140)
+
+
+	
 # EDAM\_1.14.owl
 See the [detailed change log](https://github.com/edamontology/edamontology/blob/master/changelog-detailed.md) for exact details of changes.
 
diff --git a/web/page_1.15.html b/web/page_1.15.html
index f8c73f2..08646f9 100644
--- a/web/page_1.15.html
+++ b/web/page_1.15.html
@@ -246,7 +246,9 @@ <h2 style="text-align:center">Bioinformatics operations, types of data, formats,
 
 <br/><h2><br/><a id="Download">Download and Status</a></h2>
 
-<p><b>Version 1.15</b> of EDAM has been released. <!--It uses the <a href="#Concepts">concepts</a>, <a href="#Relations">relations</a> and <a href="#Rules">rules</a> described below. -->Contributions and suggestions are welcome!</p><br/>
+<p><b>Version 1.15</b> of EDAM has been released: </p>
+<p><a href="http://edamontology.org/EDAM_1.15.owl">http://edamontology.org/EDAM_1.15.owl</a></p>
+<p>Contributions and suggestions are welcome!</p><br/>
 
 <p>Locations for download in OWL format: </p>
 <p><a href="http://edamontology.org/EDAM.owl">http://edamontology.org/EDAM.owl</a> (Always points to the last stable version)</p><br/>
@@ -1848,6 +1850,6 @@ <h2 style="text-align:center">Bioinformatics operations, types of data, formats,
 
 
 <br/><br/><hr/>
-<p><small>Last update: 2016-May-13</small></p> 
+<p><small>Last update: 2016-May-14</small></p> 
 
 </body></html>