The complete work comprises five major sections: the seventeen levels (bāhu-bhūmi) which covers the entire range of mental and spiritual levels in Buddhism according to Mahāyāna; the Compendium of Definitions (viniścaya-samgraha) which discusses and explicates aspects of the bāhu-bhūmi portion; the Compendium of Exegesis (vivarana-samgraha), a manual of hermeneutical and exegetical techniques; the Compendium of Synonyms (paryāya-samgraha) defining many of the various strings of quasi-synonymical expressions found in the Agamas; the Compendium of Topics (vastu-samgraha) summarizing and explainin the key topics of each sūtra contained in the Samyukta-āgama; and the Compendium of the Vinaya (vinaya-samgraha). The Chinese version also contains a Compendium of Abhidharma, missing from the Tibetan translation.
Most of the bāhu-bhūmi section which includes such seminal works as the Bodhisattva-bhūmi and the Śrāvaka-bhūmi suvives in Sanskrit, but little survives from the other parts.
...came to the conclusion that the many disputes and interpretational conflicts permeating Chinese Buddhism were the result of the unavailability of crucial texts in Chinese translation. In particular, he [Xuanzang] thought that a complete version of the Yogācārabhūmi-śāstra, an encyclopedic description of the stages of the Yogācāra path to Buddhahood written by Asaṅga, would resolve all the conflicts. In the sixth century an Indian missionary named Paramārtha (another major translator) had made a partial translation of it. Xuanzang resolved to procure the full text in India and introduce it to China.
Master Nan Huai-Chin touches on the Yogacarabhumi-sastra in his book "To Realize Enlightenment."