Packages 
Package Description
org.opengis.annotation  
org.opengis.coverage
Coverages (generate a value for any point).
org.opengis.coverage.grid
Quadrilateral grid coverages.
org.opengis.coverage.grid.quadrilateral
Proposed extensions to ISO 19123 grid package.
org.opengis.coverage.processing  
org.opengis.display.canvas  
org.opengis.display.container  
org.opengis.display.primitive  
org.opengis.filter
Filters features according their properties.
org.opengis.filter.capability  
org.opengis.filter.expression
Combinations of one or more elements that evaluate to single Object value.
org.opengis.filter.identity
An Identifier indicates object identity requested during data query or reference.
org.opengis.filter.query  
org.opengis.filter.sort
Indicates the ordering requested during a data query.
org.opengis.filter.spatial
Determines whether a spatial operation geometric arguments satisfy the stated spatial relationship.
org.opengis.filter.temporal  
org.opengis.geometry
Root package for geometries.
org.opengis.geometry.aggregate
Aggregations of geometric objects.
org.opengis.geometry.complex
Set of primitive geometric objects whose interiors are disjoint.
org.opengis.geometry.coordinate
Core package needed to investigate coordinate-defined geometry.
org.opengis.geometry.primitive
Set of geometric objects that are not decomposed further into other primitives.
org.opengis.metadata.citation  
org.opengis.observation  
org.opengis.observation.coverage  
org.opengis.observation.sampling  
org.opengis.referencing.gazetteer
Mapping between geographic identifiers and locations, either as descriptions or coordinates.
org.opengis.sld  
org.opengis.style
The following package is an implementation of OGC Symbology Encoding 1.1.0 and ISO 19117 : Portrayal
org.opengis.style.portrayal  
org.opengis.temporal