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OpenAtlas uses several shortcuts in order to simplify connections between entities that are always used the same way.
These shortcuts are named OA + the respective number. Currently OpenAtlas uses 3 shortcuts:

h2. OA7 "has relationship to"

OA7 is used to link two Actors (E39) via a certain relationship
E39 Actor linked with E39 Actor
* Domain: E39 Actor
* Range: E39 Actor

<pre>E39 (Actor) - P11i (participated in) - E5 (Event) - P11 (had participant) - E39 (Actor)</pre>
*Example:* [ Stefan (E21)] _participated in_ [ Relationship from Stefan to Joachim (E5)] _had participant_ [Joachim (E21)]

The connecting event is defined by an entity of class E55 (Type): 
[Relationship from Stefan to Joachim (E5)] _has type_ [Son to Father (E55)]

h2. OA8 "appears for the first time in"

OA8 is used to link the beginning of a persistent item's (E77) life span (or time of usage) with a certain place. E.g to document the birthplace of a person.
E77 Persistent Item linked with a E53 Place:
* Domain: E77 Persistent Item
* Range: E53 Place

<pre>E77 (Persistent Item) - P92i (was brought into existence by) - E63 (Beginning of Existence) - P7 (took place at) - E53 (Place)</pre>
*Example:* [Albert Einstein (E21)] _was brought into existence by_ [Birth of Albert Einstein (E12)] _took place at_ [Ulm (E53)]
.

h2. OA9 "appears for the last time in"

OA9 is used to link the end of a persistent item's (E77) life span (or time of usage) with a certain place. E.g to document a person's place of death.
E77 Persistent Item linked with a E53 Place:
* Domain: E77 Persistent Item
* Range: E53 Place

<pre>E77 (Persistent Item) - P93i (was taken out of existence by) - E64 (End of Existence) - P7 (took place at) - E53 (Place)</pre>
*Example:* [Albert Einstein (E21)] _was taken out of by_ [Death of Albert Einstein (E12)] _took place at_ [Princeton (E53)]