The Jingangdingjing yujia shiba hui zhigui （Synopsis of the Eighteen Assemblies in the Vajra/sekhara Yoga）. 1 fasc. （T 869.18.284-287）， abbr. Synopsis of the Eighteen Assemblies 十八会指归， composed by Amoghavajra 不空 shortly after his voyage to India in the mid-8th century CE. A short account of a massive corpus of esoteric literature， known in its entirety as the Vajra/sekhara 金刚顶经. This corpus is said to consist of 18 texts or "assemblies" 会 totaling 100，000 /slokas， and is headed by a fundamental work called the Tattvasam!graha 真实摄经， here said to consist of the fundamental work， whose contents are described in some detail. The remainder of the account is occupied by much shorter summaries of the remaining 17 assemblies. Several of the assemblies have since been identified with independently circulated texts， although these texts are generally larger and more evolved than indicated by Amoghavajra. Eastman （1981） has tentatively established the identity of the Vajra/sekhara and eighteen maha^yoga texts found in an edition of the rNying ma rgyud 'bum， a large collection of esoteric works associated with the rNying ma pa 宁玛流. It has also been shown by Tanaka-Ki （1984） that the ninth text， the Sama^yoga， combines the practices and six families （Vajrasattva-kula， Vairocana-kula， Heruka-kula， Vajrasu^rya-kula， Padmanarte/svara-kula， Parama^/sva-kula） of preceding assemblies. According to Tanaka-Ki （1987） and de Jong （1980）， the assemblies so far identified （partially or otherwise） with known texts are as follows:
1. Sarvatatha^gatatattvasam!graha 一切如来真实摄教王 （T 865， 882）;
4. Trailokyavijaya-maha^kalpara^ja 降三世金刚瑜伽 （part P.115， T.1040）;
6. S/ri^parama^dya 大安乐不空三昧耶真实瑜伽 （part P.119， T.244）;
7. S/ri^parama^dya 普贤瑜伽 （part P.119， T.1121）;
8. S/ri^parama^dya 胜初瑜伽 （part P.119， T.244）;
9. Sarvabuddhasama^yogad!a^kini^ja^lasam!vara 一切佛集会拏吉尼戒网瑜伽 （part P.8， P.9， To.366， T.1051）;
10. Maha^samaya 大三昧耶瑜伽 （possibly T.868）;
13. Maha^samayatattva-tantrara^ja 三昧耶真实瑜伽 （T 883）;
15. Guhyasama^ja-tantra 秘密集会瑜伽 （T 885）;
16. Advayasamata^-kalpara^ja^ 无二平等瑜伽 （T 887）.