Fetch the core tagfile to create links in the docs.

.github/workflows/doxygenate.yaml

@@ -14,10 +14,17 @@ jobs:
       uses: wei/wget@v1
       with:
         args: -O docs/doxygen-awesome.css https://raw.githubusercontent.com/jothepro/doxygen-awesome-css/main/doxygen-awesome.css
+
+    - name: Get the tatami tagfile
+      uses: wei/wget@v1
+      with:
+        args: -O docs/tatami.tag https://tatami-inc.github.io/tatami/tatami.tag
+
     - name: Doxygen Action
       uses: mattnotmitt/doxygen-action@v1.1.0
       with:
         working-directory: docs/
+
     - name: GH Pages Deployment
       uses: JamesIves/github-pages-deploy-action@4.1.3
       with:

.gitignore

@@ -1,4 +1,5 @@
 build/
 *.swp
+*.tag
 docs/html
 docs/latex

docs/Doxyfile

@@ -2137,13 +2137,13 @@ SKIP_FUNCTION_MACROS   = YES
 # the path). If a tag file is not located in the directory in which doxygen is
 # run, you must also specify the path to the tagfile here.
 
-TAGFILES               =
+TAGFILES               = tatami.tag=https://tatami-inc.github.io/tatami
 
 # When a file name is specified after GENERATE_TAGFILE, doxygen will create a
 # tag file that is based on the input files it reads. See section "Linking to
 # external documentation" for more information about the usage of tag files.
 
-GENERATE_TAGFILE       =
+GENERATE_TAGFILE       = html/tatami_hdf5.tag
 
 # If the ALLEXTERNALS tag is set to YES, all external class will be listed in
 # the class index. If set to NO, only the inherited external classes will be