Dot code including a plurality of blocks wherein each of the blocks has a block address pattern representing an address of each of the blocks

A dot code which is optically readably recorded on a recording medium, the dot code comprising a plurality of blocks each of which are arranged within a field of view of a reader for scanning the blocks to optically read the dot code, each of the blocks including:

• a data dot pattern comprising a plurality of dots arranged in accordance with contents of information to be recorded;
• a marker by which said each of the blocks is recognizable;
• and
• a block address pattern representing an address of said each of the blocks in the dot code,
• wherein the data dot pattern, the marker, and the block address pattern having a predetermined positional relationship in respective blocks,
• wherein the addresses of the blocks allow the blocks to be recognized, respectively, and the dot code to be correctly read out by the reading means regardless of an order in which the blocks are scanned, and wherein said each of the blocks further includes non-modulation regions including the marker, and a modulation region including the data dot pattern the dots of which correspond to an associated information piece of the information which is subjected to modulation processing so that the dots are distinguishable from the marker, the non-modulation regions and the modulation region having a predetermined positional relationship with respect to each other, and
• wherein the non-modulation regions of said each of the blocks include the block address pattern.