# Specifications and Supported Symbols
## Data Matrix Code Definition
* A data matrix code is a two-dimensional rectangular array of black and white cells which conveys a string of characters (digits, letters and special characters).
* It is encoded to achieve maximum packing.
* Each cell corresponds to a bit of information.
* Additional redundant bits allow error correction for robust reading of degraded symbols.
* A data matrix code is located using the **Finder pattern**:
* The bottom and left edges of a Data Matrix code contain only black cells.
* The top and right edges have alternating cells.
* A data matrix code is characterized by:
* Its logical size (number of cells).
* Its **encoding type**: ECC000 (odd symbol sizes, deprecated) or ECC200 (even symbol sizes).
#### NOTE
The data matrix code definition is provided by ISO/IEC and approved as standard ISO/IEC 16022.
## **EasyMatrixCode** Specifications
In a single read operation, [`EasyMatrixCode`](../../../reference_manual/text_and_code_reading/easymatrixcode-library.html.md) locates, unscrambles, decodes, reads and grades the quality of grayscale 2D data matrix codes of any size, contrast, location and orientation (even viewed from the back on a transparent medium), providing they meet the following specifications:
* Minimum cell (= module) size: 3x3 pixels
* Minimum quiet zone (blank zone around the matrix code) width: 1 pixel
All the non-deprecated functionalities of [`EasyMatrixCode`](../../../reference_manual/text_and_code_reading/easymatrixcode-library.html.md) are available for testing in **eVision Studio**, except for the [`EMatrixCodeReader::StopProcess`](../../../doxygen_cpp/classeVision_1_1EasyMatrixCode2_1_1EMatrixCodeReader.html#a64a4ac29123e3b6c482dfd10a26b271f) [.NET](../../../doxygen_cs/classeVision_1_1EasyMatrixCode2_1_1EMatrixCodeReader.html#a3f45e67b7d1fbcf47ba3a51b1ad33e92) [Python](../../../doxygen_python/classeVision_1_1EasyMatrixCode2_1_1EMatrixCodeReader.html#a6910648bd7c1063b073a0f8dbfd7a52f) method (for asynchronous processing).
## Supported Symbols
### ECC other than the ECC200
#### NOTE
See the **ISO/IEC 16022** standard for more information.
#### Error Correction Table
| | Correctable errors % |
|--------|------------------------|
| ECC000 | 0 |
| ECC050 | 2.8 |
| ECC080 | 5.5 |
| ECC100 | 12.6 |
| ECC140 | 25 |
#### Symbol Table
| | | | Size | Capacity (numerical | alphanumerical | byte) |
|--------|--------|--------|---------|-------------------------------------------------|
| ECC000 | ECC050 | ECC080 | ECC100 | ECC140 |
| num | alph | byte | num | alph |
| 9x9 | 6 | 3 | 1 | n/a |
| 11x11 | 12 | 8 | 5 | 1 |
| 13x13 | 24 | 16 | 10 | 10 |
| 15x15 | 37 | 25 | 16 | 20 |
| 17x17 | 53 | 35 | 23 | 32 |
| 19x19 | 72 | 48 | 31 | 46 |
| 21x21 | 92 | 61 | 40 | 61 |
| 23x23 | 115 | 76 | 50 | 78 |
| 25x25 | 140 | 93 | 61 | 97 |
| 27x27 | 168 | 112 | 73 | 118 |
| 29x29 | 197 | 131 | 86 | 140 |
| 31x31 | 229 | 153 | 100 | 164 |
| 33x33 | 264 | 176 | 115 | 190 |
| 35x35 | 300 | 200 | 131 | 217 |
| 37x37 | 339 | 226 | 148 | 246 |
| 39x39 | 380 | 253 | 166 | 277 |
| 41x41 | 424 | 282 | 185 | 310 |
| 43x43 | 469 | 313 | 205 | 344 |
| 45x45 | 500 | 345 | 226 | 380 |
| 47x47 | 560 | 378 | 248 | 418 |
| 49x49 | 596 | 413 | 271 | 457 |
### ECC200
#### NOTE
See the **ISO/IEC 16022** standard for more information.
#### Symbol Table for Square ECC200
| Size | Capacity | Correctable errors % |
|---------|-------------|-------------------------|
| num | alpha | byte |
| 10x10 | 6 | 3 |
| 12x12 | 10 | 6 |
| 14x14 | 16 | 10 |
| 16x16 | 24 | 16 |
| 18x18 | 36 | 25 |
| 20x20 | 44 | 31 |
| 22x22 | 60 | 43 |
| 24x24 | 72 | 52 |
| 26x26 | 88 | 64 |
| 32x32 | 124 | 91 |
| 36x36 | 172 | 127 |
| 40x40 | 228 | 169 |
| 44x44 | 288 | 214 |
| 48x48 | 348 | 259 |
| 52x52 | 408 | 304 |
| 64x64 | 560 | 418 |
| 72x72 | 736 | 550 |
| 80x80 | 912 | 682 |
| 88x88 | 1152 | 862 |
| 96x96 | 1392 | 1042 |
| 104x104 | 1632 | 1222 |
| 120x120 | 2100 | 1573 |
| 132x132 | 2608 | 1954 |
| 144x144 | 3116 | 2335 |
#### Symbol Table for Rectangular ECC200
| Size | Capacity | Correctable errors % |
|---------|-------------|-------------------------|
| num | alpha | byte |
| 8x18 | 10 | 6 |
| 8x32 | 20 | 13 |
| 12x26 | 32 | 22 |
| 12x36 | 44 | 31 |
| 16x36 | 64 | 46 |
| 16x48 | 98 | 72 |
### Extended Rectangular Data Matrix DMRE
#### NOTE
See the **ISO/IEC 21471** standard for more information.
#### Symbol Table
| Size | Capacity | Correctable errors % |
|---------|-------------|-------------------------|
| num | alpha | byte |
| 8x48 | 36 | 25 |
| 8x64 | 48 | 34 |
| 8x80 | 64 | 46 |
| 8x96 | 76 | 55 |
| 8x120 | 98 | 72 |
| 8x144 | 126 | 93 |
| 12x64 | 86 | 63 |
| 12x88 | 128 | 94 |
| 16x64 | 124 | 91 |
| 20x36 | 88 | 64 |
| 20x44 | 112 | 82 |
| 20x64 | 186 | 124 |
| 22x48 | 144 | 106 |
| 24x48 | 160 | 118 |
| 24x64 | 216 | 160 |
| 26x40 | 140 | 103 |
| 26x48 | 180 | 133 |
| 26x64 | 236 | 175 |