The hadith imam earned expertise in the field of Hadith according to expertise, skills, and memorization skills of thousands of hadith and knowledge of science. Degree of expertise that is as follows.
Amirul Mu'minin fil Hadith
This title was given to the caliphs after the caliph Abu Bakr The caliph was given the title of the Prophet's way to remember the answer to the question of a friend who said to the caliph, the caliphate is the same after the death of the Prophet hadisnya reported. At the time muhadisin seemed to function in conveying the sunna caliphate. Those who obtain this degree include Syu'bah Ibn al-Hajjaj, Sufyan Ats-Tsauri, Rahawaih ibn Ishaq, Ahmad ibn Hanbal, al-Bukhari, Ad-Daruquthni, and Imam Muslim.
Al-Hakim
That is, a degree of expertise for the priests who ruled the hadith that marwiyah hadith (narrated), both observations and sanadnya and know ta'dil (commendable) and tajrih (tercelanya) narrator, narrator. Each narrator knows the history of his life, his journey, the teachers and their properties that can be accepted or rejected. He must be able to memorize more than 300,000 hadiths and their traditions sanadnya. The muhadisin who received this degree include Ibn Dinar (d. 162 AH), Al-Layth ibn Sa'ad, who suffered a blind mawali the end of his life (died 175 AH), Imam Malik (179), and Imam Shafii (204 H ).
Al-Hujjah
That is, a degree of expertise for priests who could memorize the 300,000 hadith, both of honor, narrators, and about the narrator of justice, disability, biographer (his biography). The muhadisin who got this title, among others is Hisham ibn Urwa (died 146 AH), Abu Hudhayl Muhammad ibn al-Walid (died 149 AH), and Muhammad Abdullah bin Amr (died 242 AH).
Al-Hafidh
Is the degree to which experts can menshahihkan hadith narrators and honor traditions and be able to out and ta'dil to jarh the rawinya. An al-Hafidh harusmenghafal valid hadiths, knowing narrator of suspicion (much prejudice), illat-illat hadith and the terms of the muhadisin. According to some opinions, al-Hafidh it must have a capacity of 100,000 hadith memorization. The muhadisin who received this degree include al-Iraqi, Sharafuddin ad-Dimyathi, Ibn Hajar al-Asqalani, and Ibn Daqiqil Id.
Al-Muhaddits
According to muhadisin-muhadditsin mutaqaddimin, al-Hafidh and al-muhaddits were synonymous. However, according to mutaakhkhirin, al-Hafidh was more specific than the al-muhaddits. At-Tajus said Subhi, "Al-muhaddits is someone who can see narrators, narrators, illat-illat, rijal names (narrator-narrator), ali (high), and nazil (low) was a hadith, understanding kutubus sittah: Musnad Ahmad, Sunan al-Bayhaqi, Majmoo Thabarani, and memorize the hadith at least kurangnya100 fruit. Muhadisin who received this degree include Ata ibn Abi Ribah (a mufti of the community of Mecca, d. 115 AH) and Imam Az-Zabidi (one mengikhtisharkan scholars Bukhari-Muslim books. "
Al-Musnid
Namely, a degree of expertise for those who transmitted sanadnya, both master of science or not. Al-musnid also called at-Talib, al-mubtadi, and ar-narrator.
Source: Adapted from Overview Mushthalahul Hadith, Drs. Fatchur Rahman.