+@node SPV Structure object and image Elements
+@subsection The @code{object} and @code{image} Elements
+
+@example
+object :type[object_type]=(unknown)? :uri => EMPTY
+
+image :VDPId :commandName => dataPath
+@end example
+
+These two elements represent an image in PNG format. They are
+equivalent and the corpus contains examples of both. The only
+difference is the syntax: for @code{object}, the @code{uri} attribute
+names the Zip member that contains a PNG file; for @code{image}, the
+text of the inner @code{dataPath} element names the Zip member.
+
+PSPP writes @code{object} in output but there is no strong reason to
+choose this form.
+
+The corpus only contains PNG image files.
+