The JCR API library is a core dependency for most of the [Jackrabbit components]. The {{jcr-1.0.jar}} file contains all the [javax.jcr interfaces|http://www.day.com/maven/jsr170/javadocs/jcr-1.0/] specified by [JSR 170|http://jcp.org/en/jsr/detail?id=170].

The JCR API library is available under the [Day Spec License|http://www.day.com/maven/jsr170/licenses/day-spec-license.htm] and can be downloaded either from the [JCP web site|http://jcp.org/aboutJava/communityprocess/final/jsr170/index.html] or the [central Maven repository|http://repo1.maven.org/maven2/javax/jcr/jcr/1.0/].