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+
+INTRODUCTION
+=====
+This file describes the format of the database generated by XSeeker
+Preprocessor. This format will evolve in the future to fit users
+wanted features. That's why there is a history of versions numbers,
+describing what they brought to the sqlite file, and how it was usefull.
+
+The first version (the older one) is at the bottom of this file, and the
+modifications provided by the newest versions are on top of the file.
+
+
+VERSION 1.1.2
+=====
+add missing mz_tab_info$group_length field to produce mzTab
+
+VERSION 1.1.1
+=====
+add missing mz_tab_info$dataset_path field to produce mzTab
+
+
+VERSION 1.1.0
+=====
+Summary:
+ - The field `mz_tab_info` was added in new table smol_xcms_set.
+
+smol_xcms_set table added
+-----
+This table contains a subset of the original ms file.
+
+mz_tab_info field added to smol_xcms_set
+-----
+This field contains five subfields:
+ - sampclass ;
+ - sampnames ;
+ - rtmed ;
+ - mzmed ;
+ - smallmolecule_abundance_assay .
+
+These fields were added after users asked to export data from XSeeker
+in mzTab files.
+XCMS has some functions to extract sampclass, sampnames, rtmed, mzmed
+and smallmolecule_abundance_assay from xcms set. Then, they are used
+in the mz tab creation process, but we didn't want to keep the whole
+xcmsset object. So we used the original code from XCMS and modified it
+a little bit, justifying the extraction of these new fields.
+
+
+VERSION 1.0.0
+=====
+
+
+DATABASE
+-----
+
+### SAMPLE
+
+#### RAW
+This structure is an epurated and enriched version of the original
+rdata, saved as a compressed env:  
+`blob::blob(fst::compress_fst(serialize(raw, NULL), compression=100))`
+
+The fields contained in the env are as follow:
+
+##### variableMetadata
+
+##### tic
+
+##### mz
+
+##### scanindex
+
+##### scantime
+
+##### intensity
+
+##### polarity
+
+##### sample_name
+
+##### dataset_path
+
+##### process_params
+
+##### enriched_rdata
+
+##### enriched_rdata_version
+
+##### tool_name
+
+##### enriched_rdata_doc
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