Normally, the Section Value field in a symbol table entry is a one-based index into the Section Table. However, this field is a signed integer and may take negative values. The following values, less than one, have special meanings:
| Constant | Value | Description |
| IMAGE_SYM_UNDEFINED | 0 | Symbol record is not yet assigned a section. If the value is 0 this indicates a references to an external symbol defined elsewhere. If the value is non-zero this is a common symbol with a size specified by the value. |
| IMAGE_SYM_ABSOLUTE | -1 | The symbol has an absolute (non-relocatable) value and is not an address. |
| IMAGE_SYM_DEBUG | -2 | The symbol provides general type or debugging information but does not correspond to a section. Microsoft tools use this setting along with .file records (storage class FILE). |