Properties are key-value pairs. When they are associated with a single entry
or with a tree they need to be inserted into a special drawer
(see Drawers) with the name
PROPERTIES, which has to be located
right below a headline, and its planning line (see Deadlines and scheduling) when applicable. Each property is specified on a single line,
with the key (surrounded by colons) first, and the value after it. Keys are
case-insensitive. Here is an example:
* CD collection ** Classic *** Goldberg Variations :PROPERTIES: :Title: Goldberg Variations :Composer: J.S. Bach :Artist: Glen Gould :Publisher: Deutsche Grammophon :NDisks: 1 :END:
Depending on the value of
org-use-property-inheritance, a property set
this way will either be associated with a single entry, or the subtree
defined by the entry, see Property inheritance.
You may define the allowed values for a particular property ‘:Xyz:’ by setting a property ‘:Xyz_ALL:’. This special property is inherited, so if you set it in a level 1 entry, it will apply to the entire tree. When allowed values are defined, setting the corresponding property becomes easier and is less prone to typing errors. For the example with the CD collection, we can predefine publishers and the number of disks in a box like this:
* CD collection :PROPERTIES: :NDisks_ALL: 1 2 3 4 :Publisher_ALL: "Deutsche Grammophon" Philips EMI :END:
If you want to set properties that can be inherited by any entry in a file, use a line like
#+PROPERTY: NDisks_ALL 1 2 3 4
Contrary to properties set from a special drawer, you have to refresh the buffer with C-c C-c to activate this change.
If you want to add to the value of an existing property, append a
the property name. The following results in the property
the value “foo=1 bar=2”.
#+PROPERTY: var foo=1 #+PROPERTY: var+ bar=2
It is also possible to add to the values of inherited properties. The
following results in the
genres property having the value “Classic
Baroque” under the
Goldberg Variations subtree.
* CD collection ** Classic :PROPERTIES: :GENRES: Classic :END: *** Goldberg Variations :PROPERTIES: :Title: Goldberg Variations :Composer: J.S. Bach :Artist: Glen Gould :Publisher: Deutsche Grammophon :NDisks: 1 :GENRES+: Baroque :END:
Note that a property can only have one entry per Drawer.
Property values set with the global variable
org-global-properties can be inherited by all entries in all
The following commands help to work with properties: