Epistemology studies the nature of information.
The following is a list of the complete secular vocal output composed by Franz Schubert -LRB- 31 January 1797 -- 19 November 1828 -RRB- .. Franz Schubert. Franz Schubert. It is divided into eleven sections , and attempts to reflect the most current information with regards to Schubert 's catalogue .. The works contained in this list refer to those found primarily in the following two series of the New Schubert Edition -LRB- NSE -RRB- edition  :. New Schubert Edition. New Schubert Edition. Series III  : Partsongs , Choruses and Cantatas -LRB- Mehrstimmige Gesange -RRB-. Series IV  : Songs for solo voice -LRB- Lieder -RRB-. Note however that some of Schubert 's song cycles contain both Lieder and part songs .. The list below includes the following information  : ''. D -- the catalogue number assigned by Otto Erich Deutsch or NSE authorities. Otto Erich Deutsch. Otto Erich Deutsch. Genre -- the musical genre to which the piece belongs. Title -- the title of the work. Incipit -- the first line -LRB- s -RRB- of text , as pertaining to vocal works. Scoring -- the instrumentation and / or vocal forces required for the work. Informal Title -- any additional names by which the work is known , when applicable. Former Deutsch Number -- information on Deutsch numbers that have been reassigned , when applicable. Date -- the known or assumed date of composition , when available ; or date of publication. Opus Number -- the opus number of the original publication of the work , when applicable. Setting -- the order of setting as it pertains to vocal works that have numerous settings of the same text. Version -- the number of version as it pertains to vocal settings that have more than one existing version. Notes -- any additional information concerning the work  : alternate titles , completeness , relation to other works , authorship , etc. .