MML common format External reference format

Element list

		Elements		Attribute		Datatypes		Occurrence		Table id
4.		mmlCm:extRef
				mmlCm:contentType		string		#IMPLIED
				mmlCm:medicalRole		string		#IMPLIED
				mmlCm:title		string		#IMPLIED
				mmlCm:href		string		#REQUIRED

Occurrence None: 1 appearance without fail, ?: 0 or 1 appearance, +: 1 or more appearance, *: 0 or more appearance
#REQUIRED: Mandatory attribute, #IMPLIED: Omissible attribute

 

Element explanation

 

4. mmlCm:extRef (external reference format)

[Detail] Common format that indicates external reference.

[Attribute]

Attribute name	Data type	Omission	Table used	Explanation
mmlCm:contentType	string	#IMPLIED		Type code of external reference information
mmlCm:medicalRole	string	#IMPLIED		External reference information format
mmlCm:title	string	#IMPLIED		Title
mmlCm:href	string	#REQUIRED		Location of external reference information

For data of specimen test result, prescription and image; (1) HL7 or DICOM standards are available. (2) The binary data format is efficient for data exchange. (3) The data is often managed in an independent data file. For these reasons, it is strongly recommended that such data should be stored in an data file independent from the MML instance and be externally referenced from the MML. The method for inserting these data into the MML instance has not been reviewed sufficiently. In this specification, the data is externally referenced.

External reference format shows the following description format.

 

mmlCm:contentType

contentType is in accordance with the Content-Type of MIME (RFC 2045, 2046, 2047) . In addition to “TEXT/PLAIN,” “IMAGE/DICOM,” “APPLICATION/HL72.3-HL7ER2.3,” etc. are defined in the MERIT-9 (MEdical Record Image Text Information eXchange). For details, refer to the CONTENT-TYPE of MERIT-9.

In a similar manner, images in multiple formats such as “IMAGE/ JPEG,” “IMAGE/ GIF,” “IMAGE/TIFF,” etc. can be externally referenced.

 

mmlCm:medicalRole

When the external reference file is classified in the user application, an effective reference can be made. Therefore, medicalRole shows types for classification of all external files expected in the MML. Table MML0033 is used.

 

mmlCm:title

Character string that indicates the individual external reference file is shown. This is used in the following cases:
[Example]

Prescription on discharge
Chest X-ray after pleural cavity drainage
Chest CT scan immediately after chemical treatment
Vital sign table (August, 1999)
Sketch of coronary angiography
Literature for similar cases

 

mmlCm:href

Since it is expected that the relative uri description and the external reference file from the MML instance are attached to the MML instance for transmission, the absolute uri is not used. The file name and the directory setting are defined by the user.

 

mmlCm:extRef (external reference format) sample instance

<extRefs> <mmlCm:extRef mmlCm:contentType = "APPLICATION/HL72.3-HL7ER2.3" mmlCm:medicalRole = "prescription" mmlCm:title = "Prescription on discharge" mmlCm:href = "patient1234/prescription831.HL7"/> </extRefs>