This is the standard bundle for a National Centers for Environmental Information archival information package (also referred to as an AIP or an accession). Each AIP maintained by NCEI using this AIP bundle is given a unique integer identifier known as an 'accession id'. All information related to that accession identifier is contained within a directory using the accession id as the directory name. The accession directory has the following standard structure: : This directory NCEI-Readme.txt: This file. about: Directory. Contains AIP related metadata including but not limited to the following two standard files. journal.txt: Text file. Contains any notes, actions taken by NCEI, etc., relating to this accession. .md5: Text file: contains MD5 checksums for all files in this accession except for the .md5 file itself. Other metadata files may include correspondence between NCEI and a data provider, files created by NCEI to document contents of the AIP, etc. data: Directory. All archived data are located in the 'data' directory. 0-data: Directory. Contains the originator's data unmodified from its initial digital format as submitted to NCEI. The initial source for the archived data should be documented in the header of the /about/journal.txt file after the keyword, 'Source'. 1-data: Optional directory. May contain processed version(s) of originator's data from '0-data' directory. The filename convention should indicate the relationship between the original file in '0-data' and the processed file in '1-data'. Any processing done by NCEI to create files in '1-data- should be annotated in /about/journal.txt to explainhow files in 1-data were derived from the files in 0-data. For further information about this accession see: ./about/journal.txt