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-rw-r--r--doc/manual/glossary.xml27
1 files changed, 24 insertions, 3 deletions
diff --git a/doc/manual/glossary.xml b/doc/manual/glossary.xml
index 2c4f55c7e..cf0da3824 100644
--- a/doc/manual/glossary.xml
+++ b/doc/manual/glossary.xml
@@ -3,10 +3,16 @@
<glosslist>
-<glossentry><glossterm>derivation</glossterm>
+<glossentry id="gloss-derivation"><glossterm>derivation</glossterm>
<glossdef><para>A description of a build action. The result of a
- derivation is a store object.</para></glossdef>
+ derivation is a store object. Derivations are typically specified
+ in Nix expressions using the <link
+ linkend="ssec-derivation"><function>derivation</function>
+ primitive</link>. These are translated into low-level
+ <emphasis>store derivations</emphasis> (implicitly by
+ <command>nix-env</command> and <command>nix-build</command>, or
+ explicitly by <command>nix-instantiate</command>).</para></glossdef>
</glossentry>
@@ -73,7 +79,22 @@
</glossentry>
+<glossentry><glossterm>closure</glossterm>
+
+ <glossdef><para>The closure of a store path is the set of store
+ paths that are directly or indirectly “reachable” from that store
+ path. For instance, if the store object at path
+ <varname>P</varname> contains a reference to path
+ <varname>Q</varname>, then <varname>Q</varname> is in the closure of
+ <varname>P</varname>. For correct deployment it is necessary to
+ deploy whole closures, since otherwise at runtime files could be
+ missing. The command <command>nix-store -qR</command> prints out
+ closures of store paths.</para></glossdef>
+
+</glossentry>
+
+
</glosslist>
-</appendix> \ No newline at end of file
+</appendix>