An OBIDMS is also contitued by views

doc/source/formats.rst

@@ -7,26 +7,27 @@ Formats
 The OBItools3 Data Management System (OBIDMS)
 *********************************************
 
-An OBIDMS directory consists of : 
+An OBIDMS directory consists of :
 	* OBIDMS column files
+	* OBIDMS view descriptions
 	* an OBIDMS history file
 
 
 OBIDMS column files
 ===================
- 
+
 Each OBIDMS column file contains :
-	* a header of a size equal to a multiple of PAGESIZE (PAGESIZE being equal to 4096 bytes 
+	* a header of a size equal to a multiple of PAGESIZE (PAGESIZE being equal to 4096 bytes
 	  on most systems) containing metadata
 	* one column of data of the same type
-	
+
 OBIDMS column files are read-only.
 
 
 File name
 ---------
 
-Each file is named with the attribute associated to the data it contains, and the number of 
+Each file is named with the attribute associated to the data it contains, and the number of
 its version, separated by an underscore.
 
 Example : ``count_0003``
@@ -39,10 +40,10 @@ Header
 ------
 
 The header of an OBIDMS column contains :
-	
+
 	* Endian byte order
 	* PAGESIZE value / Size of the header
-	
+
 	* Number of lines (total or without the header?)
 	* Data type (int, str...)
 	* Date of creation
@@ -59,10 +60,10 @@ A column of data of the same type.
 Versioning
 ----------
 
-Since OBIDMS column files are read-only, any modification leads to the creation of a new version 
+Since OBIDMS column files are read-only, any modification leads to the creation of a new version
 of the column file.
 
-The first version of a column file is numbered 0001, and each new version increments that 
+The first version of a column file is numbered 0001, and each new version increments that
 number by 1.
 
 
@@ -72,19 +73,19 @@ Mandatory columns
 Some columns must exist in an OBIDMS directory :
 	* sequence identifiers column
 
-	
+
 OBIDMS history file
 ===================
 
-An OBIDMS history file consists of data that can be represented in the form of a directed acyclic 
+An OBIDMS history file consists of data that can be represented in the form of a directed acyclic
 graph presenting the history of all the operations ever done in the OBIDMS directory.
 
 
 OBIDMS views
 ============
 
-An OBIDMS view corresponds to a list of OBIDMS columns and lines. A view includes one version 
-of each mandatory column. Only one version of each column is included. All the columns of 
+An OBIDMS view corresponds to a list of OBIDMS columns and lines. A view includes one version
+of each mandatory column. Only one version of each column is included. All the columns of
 one view contain the same number of lines in the same order.
 
 
@@ -99,4 +100,3 @@ OBIIntColumn header file
 ========================
 
 .. doxygenfile:: obiintcolumn.h
-