====== Attribute ======

Persistent fields (in the java sense) of a Node are attributes. Basically, all fields that are NOT ''static'', ''const'' nor ''transient'' are attributes. The [[:01_user_documentation:06_graph:07_persistence|persistence]] management of the Node require each attribute to have accessors, which are declared in the node. 

===== Accessor =====

Attribute accessors are the methods to get and set the attribute value. The accessors of a Node are automatically resolved by the compiler with the syntax: 
<code java>
Sphere s; // has an attribute diameter
s[diameter] = 5; // automatically resolve the setter
float d = s[diameter]; // automatically resolve the getter
</code>

===== Editor =====

Additionally, some attributes can be edited with the [[:|attribute editor]]. The attribute needs to be [[:01_user_documentation:03_interacting_with_groimp:02_panels:04_attribute_editor:02_property_editors|editable]] and not ''hidden''
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