Hi If I am not mistaken this is how it works: if a node type (mixin or not) is defined to be the super type of another node type, that node type inherits the characteristic of the super type (mixin or not)... in case of a mixin that mixin then doesn't need to be added explicitly.
In other words: if Node n is of type 'nt', which extends from 'mixin', then n.isNodeType('mixin') will return true. Here the javadoc of Node.isNodeType(String): /** * Returns <code>true</code> if this node is of the specified primary node * type or mixin type, or a subtype thereof. Returns <code>false</code> * otherwise. * <p> * This method respects the effective node type of the node. * * @param nodeTypeName the name of a node type. * @return <code>true</code> If this node is of the specified primary node * type or mixin type, or a subtype thereof. Returns * <code>false</code> otherwise. * @throws RepositoryException if an error occurs. */ public boolean isNodeType(String nodeTypeName) throws RepositoryException; hope that helps angela ________________________________ From: Andreas Schaefer <schaef...@me.com.INVALID> Sent: Thursday, March 12, 2020 4:32 PM To: users@jackrabbit.apache.org <users@jackrabbit.apache.org> Subject: Mixins and Super Types Hi I created a Mixin and added it to Node Types as super type. Then I tried to add it as Mixin with Node.addMixin(mixin-name) but that does nothing. Looking at the TreeUtil.addMixin() I see that in that case no mixin is added. My question is that when a mixin is a super type of a node type then there is no need to add it as jar:mxinTypes? - Andy