+ nick, url, notes, anniversary
+.IP
+Note: if you don't define any view, abook will use a default display based
+on the above standard fields.
+
+
+.SH VARIABLES
+
+.TP
+\fBautosave\fP=[true|false]
+Defines whether the addressbook is automatically saved on exit. Default is true.
+
+.TP
+\fBpreserve_fields\fP=[all|standard|none]
+Specifies how fields not declared with the \fBfield\fP command nor in a view
+should be preserved while loading an abook database.
+.RS
+.TP
+.B all
+preserve any completely unknown field.
+.TP
+.B standard
+only preserve the standard fields (see a list in the
+ description of the \fBview\fP command) and the legacy
+ 'custom[1-5]' fields.
+.TP
+.B none
+discards any unknown field.
+.RE
+.IP
+Default is \fIstandard\fP.