However, there are fairly clear definitions of what consitutes Christian Publishing. The Evangelical Christian Publishers Association (ECPA) is an international organization of companies that are involved in the publishing and distribution of Christian content worldwide.
Content published by ECPA members must be consistent with their Statement of Faith, which is essentially the same as the Statement of Faith of the National Association of Evangelicals.
The Statement of Faith of the Association is as follows:
II. We believe there is only one God, eternally existent in three persons: Father, Son and Holy Spirit.
III. We believe in the deity of our Lord Jesus Christ, in His virgin birth, in His sinless life, in His miracles, in His vicarious and atoning death through His shed blood, in His bodily resurrection, in His ascension to the right hand of the Father, and in His personal return in power and glory.
IV. We believe that for the salvation of the lost and sinful, regeneration by the Holy Spirit is absolutely essential.
V. We believe in the present ministry of the Holy Spirit by whose indwelling the Christian is enabled to live a godly life.
VI. We believe in the resurrection of both the saved and the lost; they that are saved unto the resurrection of life and they that are lost unto the resurrection of damnation.
VII. We believe in the spiritual unity of believers in our Lord Jesus Christ.
Further information is available at the ECPA website. Other relevant industry organisations are the Christian Small Publishers Association, a network of over 100 small Christian publishers in the US and internationally, and the CBA (formerly the Christian Booksellers Association), the trade association for approximately 1,700 US Christian retail outlets.