Paramparā of the Atharva Veda and Purāṇas; Definition of a Purāṇa
Daśa-lakṣaṇam
एवंलक्षणलक्ष्याणि पुराणानि पुराविद: । मुनयोऽष्टादश प्राहु: क्षुल्लकानि महान्ति च ॥ २२ ॥
evaṁ lakṣaṇa-lakṣyāṇi purāṇāni purā-vidaḥ munayo ’ṣṭādaśa prāhuḥ kṣullakāni mahānti ca
精通古史的圣贤宣说:依其种种特征,诸《普拉那》分为十八部大《普拉那》与十八部次《普拉那》。
This verse states that the sages have declared the Purāṇas to be eighteen in number, categorized as some minor and some great.
In Canto 12, Śukadeva summarizes and systematizes Vedic literature for Parīkṣit Mahārāja, explaining how Purāṇas are identified by their defining topics and how they are traditionally counted and classified.
Use it as a guide to study Purāṇas thoughtfully—look for their defining themes and understand that texts vary in scope (minor vs. great), helping you choose reliable, comprehensive sources for devotion and philosophy.