In this subtitle the following words have the meanings indicated. “Injunctive relief” means: a permanent injunction; a temporary injunction; or a temporary restraining order. “Labor dispute” includes any controversy, regardless of whether the disputants stand in the proximate relation of employee or employer, concerning: terms or conditions of employment; employment relations; the association or representation of persons in negotiating, setting, maintaining, or changing terms or conditions of employment; or any other controversy arising out of the respective interests of employee or employer. “Person participating or interested in a labor dispute” means a person against whom relief is sought if the person: is engaged in the industry, craft, trade, or occupation in which the dispute occurs; or is an agent, member, or officer of an association of employees or employers engaged in the industry, craft, trade, or occupation in which the dispute occurs.