_MDL

Metadatacopy
struct _MDL {
    struct _MDL* Next;/* 0x0  4 */
    short Size;/* 0x4  2 */
    short MdlFlags;/* 0x6  2 */
    struct _EPROCESS* Process;/* 0x8  4 */
    void* MappedSystemVa;/* 0xc  4 */
    void* StartVa;/* 0x10  4 */
    unsigned long ByteCount;/* 0x14  4 */
    unsigned long ByteOffset;/* 0x18  4 */
};
/* source: Windows 2000 RC2 DDK Alpha libcntpr.lib CodeView type records; build 2128 per the DDK's ntverp.h */