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-rw-r--r--doc/manual/glossary.xml12
1 files changed, 11 insertions, 1 deletions
diff --git a/doc/manual/glossary.xml b/doc/manual/glossary.xml
index cf0da38245..c3dc36fb3f 100644
--- a/doc/manual/glossary.xml
+++ b/doc/manual/glossary.xml
@@ -46,7 +46,7 @@
 </glossentry>
 
 
-<glossentry><glossterm>substitute</glossterm>
+<glossentry id="gloss-substitute"><glossterm>substitute</glossterm>
 
   <glossdef><para>A substitute is a command invocation stored in the
   Nix database that describes how to build a store object, bypassing
@@ -94,6 +94,16 @@
 </glossentry>
 
 
+<glossentry id="gloss-validity"><glossterm>validity</glossterm>
+
+  <glossdef><para>A store path is considered
+  <emphasis>valid</emphasis> if it exists in the file system, is
+  listed in the Nix database as being valid, and if all paths in its
+  closure are also valid.</para></glossdef>
+
+</glossentry>
+
+
 </glosslist>