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## 7 Properties and columns

Properties are a set of key-value pairs associated with an entry. There are two main applications for properties in Org-mode. First, properties are like tags, but with a value. Second, you can use properties to implement (very basic) database capabilities in an Org buffer. For an example of the first application, imagine maintaining a file where you document bugs and plan releases for a piece of software. Instead of using tags like `:release_1:`, `:release_2:`, one can use a property, say `:Release:`, that in different subtrees has different values, such as `1.0` or `2.0`. For an example of the second application of properties, imagine keeping track of your music CDs, where properties could be things such as the album, artist, date of release, number of tracks, and so on.

Properties can be conveniently edited and viewed in column view (see Column view).