PS 3.10-2006 Page 21 Attribute Name Tag Type Attribute Description File Preamble No Tag or Length Fields 1 A fixed 128 byte field available for Application Profile or implementation specified use. If not used by an Application Profile or a specific implementation all bytes shall be set to 00H. File-set Readers or Updaters shall not rely on the content of this Preamble to determine that this File is or is not a DICOM File. DICOM Prefix No Tag or Length Fields 1 Four bytes containing the character string "DICM". This Prefix is intended to be used to recognize that this File is or not a DICOM File. Group Length (0002,0000) 1 Number of bytes following this File Meta Element (end of the Value field) up to and including the last File Meta Element of the Group 2 File Meta Information File Meta Information Version (0002,0001) 1 This is a two byte field where each bit identifies a version of this File Meta Information header. In version 1 the first byte value is 00H and the second value byte value is 01H. Implementations reading Files with Meta Information where this attribute has bit 0 (lsb) of the second byte set to 1 may interpret the File Meta Information as specified in this version of PS 3.10. All other bits shall not be checked. Note: A bit field where each bit identifies a version, allows explicit indication of the support of multiple previous versions. Future versions of the File Meta Information that can be read by version 1 readers will have bit 0 of the second byte set to 1 Media Storage SOP Class UID (0002,0002) 1 Uniquely identifies the SOP Class associated with the Data Set. SOP Class UIDs allowed for media storage are specified in PS 3.4 of the DICOM Standard - Media Storage Application Profiles. Media Storage SOP Instance UID (0002,0003) 1 Uniquely identifies the SOP Instance associated with the Data Set placed in the file and following the File Meta Information. Transfer Syntax UID (0002,0010) 1 Uniquely identifies the Transfer Syntax used to encode the following Data Set. This Transfer Syntax does not apply to the File Meta Information. Note: It is recommended to use one of the DICOM Transfer Syntaxes supporting explicit Value Representation encoding to facilitate interpretation of File Meta Element Values. JPIP Referenced Pixel Data Transfer Syntaxes are not used. (See PS 3.5 of the DICOM Standard). Implementation Class UID (0002,0012) 1 Uniquely identifies the implementation which wrote this file and its content. It provides an unambiguous identification of the type of implementation which last wrote the file in the event of interchange problems. It follows the same policies as defined by PS 3.7 of the DICOM Standard (association negotiation). Implementation Version Name (0002,0013) 3 Identifies a version for an Implementation Class UID (0002,0012) using up to 16 characters of the repertoire identified in Section 8.5. It follows the same policies as defined by PS 3.7 of the DICOM Standard (association PS 3.10-2006 Page 22 negotiation). Source Application Entity Title (0002,0016) 3 The DICOM Application Entity (AE) Title of the AE which wrote this file's content (or last updated it). If used, it allows the tracing of the source of errors in the event of media interchange problems. The policies associated with AE Titles are the same as those defined in PS 3.8 of the DICOM Standard. Private Information Creator UID (0002,0100) 3 The UID of the creator of the private information (0002,0102). Private Information (0002,0102) 1C Contains Private Information placed in the File Meta Information. The creator shall be identified in (0002,0100). Required if Private Information Creator UID (0002,0100) is present.