EDIT

package eu.etaxonomy.cdm.model.reference;

import java.util.List;

import javax.persistence.Column;

import org.hibernate.annotations.Cascade;

import org.hibernate.annotations.CascadeType;

import org.hibernate.annotations.Table;

import org.hibernate.envers.Audited;

import org.hibernate.search.annotations.Field;

import org.hibernate.search.annotations.Index;

	@NullOrNotEmpty

	@Length(max = 255)

	@Pattern(regexp = "^([a-z0-9+.-]+):(?://(?:((?:[a-z0-9-._~!$&'()*+,;=:]|%[0-9A-F]{2})*)@)?((?:[a-z0-9-._~!$&'()*+,;=]|%[0-9A-F]{2})*)(?::(\\d*))?(/(?:[a-z0-9-._~!$&'()*+,;=:@/]|%[0-9A-F]{2})*)?|(/?(?:[a-z0-9-._~!$&'()*+,;=:@]|%[0-9A-F]{2})+(?:[a-z0-9-._~!$&'()*+,;=:@/]|%[0-9A-F]{2})*)?)(?:\\?((?:[a-z0-9-._~!$&'()*+,;=:/?@]|%[0-9A-F]{2})*))?(?:#((?:[a-z0-9-._~!$&'()*+,;=:/?@]|%[0-9A-F]{2})*))?$", groups = Level2.class, message = "{eu.etaxonomy.cdm.model.reference.Reference.uri.message}") 

	//flag to subselect only references that could be useful for nomenclatural citations. If a reference is used as a

	//nomenclatural reference in a name this flag should be automatically set

	 * 

	 * @return  the URI of <i>this</i> reference

	 */

		return this.uri;

	}

	/**

	 * @see #getUri()

	 */

		this.uri = uri;

	}