--- /dev/null
+// sEXT2 - Simple File System Example
+// Space Definition Language File
+
+set Block(int) : partition
+ UsedBlock |
+ FreeBlock;
+
+set FreeBlock(int);
+
+set Inode(int) : partition
+ UsedInode |
+ FreeInode;
+
+set FreeInode(int);
+
+set UsedInode(int) : partition
+ FileInode |
+ DirectoryInode ;
+
+set FileInode(int);
+
+set DirectoryInode(int) : RootDirectoryInode;
+
+set RootDirectoryInode(int);
+
+set UsedBlock(int) : partition
+ SuperBlock |
+ GroupBlock |
+ FileDirectoryBlock |
+ InodeTableBlock |
+ InodeBitmapBlock |
+ BlockBitmapBlock;
+
+set FileDirectoryBlock(int) :
+ DirectoryBlock |
+ FileBlock;
+
+set SuperBlock(int);
+
+set GroupBlock(int);
+
+set FileBlock(int);
+
+set DirectoryBlock(int);
+
+set InodeTableBlock(int);
+
+set InodeBitmapBlock(int);
+
+set BlockBitmapBlock(int);
+
+set DirectoryEntry(DirectoryEntry);
+
+// relations xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
+
+inodeof: DirectoryEntry -> UsedInode (many->1);
+
+contents: UsedInode -> FileDirectoryBlock (1->many);
+
+inodestatus: Inode -> token (many->1);
+
+blockstatus: Block -> token (many->1);
+
+referencecount: Inode -> int (many->1);
+
+filesize: Inode -> int (many->1);
+
+
+
+
+
+
+