Metadata elements

Main Page > Development > Development documentation > Metadata elements

This page identifies a minimum set of metadata elements designed to ensure authenticity and interoperability of preserved objects and to facilitate their retrieval.

This process involves:

1. Using the InterPARES Chain of Preservation (COP) model and the CoP/PREMIS crosswalk to identify required elements for objects preserved by Archivematica
2. Analyzing existing metadata in the Archivematica AIP log files and METS.xml file in order to map them to METS and PREMIS elements
3. Comparing 1) to 2) in order to determine what gaps exist in Archivematica
4. Filling in the gaps - eg by modifying workflow to produce and/or capture missing elements
5. Structuring the required elements into the Repository eXchange Package (RXP) specification
6. Determining what metadata belongs in the DIP(s)

Map of Archivematica 0.6 metadata to PREMIS elements

Source: /data/logs/MD5checksum.txt
Process: Produced when quarantine period expires. Provides checksums for each object in the SIP. Note that if zipped files are present, a checksum is generated for the zipped file and not for each object within it.
Description	PREMIS entity	PREMIS semantic unit	PREMIS semantic component	Sample value(s)
Checksum	Object	1.5.2 Fixity	1.5.2.2 messageDigest	326e0206ae83f815e4be5f28464f6ac6
Source: /data/logs/filenameCleanup.log
Process: Produced when quarantine period expires, prior to unpacking of any zipped files. If prohibited characters were present in filenames, provides crosswalk between original and "cleaned up" filenames.
Description	PREMIS entity	PREMIS semantic unit	PREMIS semantic component	Sample value(s)
Original filename	Object	1.6 originalName	none	Syllabus final.doc
Cleaned-up filename	Event	2.5.2 eventOutcomeDetail	2.5.2.1 eventOutcomeDetailNote	Syllabus_final.doc
Source: /data/logs/fileUUIDs.log
Process: Produced after prohibited characters are removed from filenames and any zipped files have been unpacked. Provides a crosswalk between cleaned-up filenames and UUIDs.
Description	PREMIS entity	PREMIS semantic unit	PREMIS semantic component	Sample value(s)
Universal unique identifier (UUID)	Object	1.1 objectIdentifier	1.1.2 objectIdentifierValue	270bd067-0483-4c5f-bdec-f2cbd6e651aa
Source: /data/logs/FITS-[UUID]-[SIP].xml (FITS output reports)
Process: Produced when FITS tool identifies and validates formats and extracts technical metadata
FITS element	PREMIS entity	PREMIS semantic unit	PREMIS semantic component	Sample value(s)
format	Object	1.5.4.1 formatDesignation	1.5.4.1.1 formatName	Tagged Image File Format Waveform Audio Microsoft Powerpoint Presentation
version	Object	1.5.4.1 formatDesignation	1.5.4.1.2 formatVersion	6.0
externalIdentifier	Object	1.5.4.2 formatRegistry	1.5.4.2.2 formatRegistryKey	fmt/10
Size	Object	1.5 objectCharacteristics	1.5.3 size	125968
ImageWidth	Object	1.4 significantProperties	1.4.2 significantPropertiesValue	2464
ImageHeight	Object	1.4 significantProperties	1.4.2 significantPropertiesValue	3248
BitsPerSample	Object	1.4 significantProperties	1.4.2 significantPropertiesValue	8
SamplesPerPixel	Object	1.4 significantProperties	1.4.2 significantPropertiesValue	3
XResolution	Object	1.4 significantProperties	1.4.2 significantPropertiesValue	300
YResolution	Object	1.4 significantProperties	1.4.2 significantPropertiesValue	300
duration	Object	1.4 significantProperties	1.4.2 significantPropertiesValue	0:2:26:16
bitDepth	Object	1.4 significantProperties	1.4.2 significantPropertiesValue	16
sampleRate	Object	1.4 significantProperties	1.4.2 significantPropertiesValue	48000.0
channels	Object	1.4 significantProperties	1.4.2 significantPropertiesValue	2
aes:channelAssignment	Object	1.4 significantProperties	1.4.2 significantPropertiesValue	channelNum="0" mapLocation="LEFT" channelNum="1" mapLocation="RIGHT"
VideoFrameRate	Object	1.4 significantProperties	1.4.2 significantPropertiesValue	30.0 29.97 fps
AspectRatio	Object	1.4 significantProperties	1.4.2 significantPropertiesValue	1:1
PageCount	Object	1.4 significantProperties	1.4.2 significantPropertiesValue	16
WordCount	Object	1.4 significantProperties	1.4.2 significantPropertiesValue	876
Paragraphs	Object	1.4 significantProperties	1.4.2 significantPropertiesValue	19
Slides	Object	1.4 significantProperties	1.4.2 significantPropertiesValue	27
Source: /data/logs/normalization.log
Process: Produced during normalization to preservation and access formats
Description	PREMIS entity	PREMIS semantic unit	PREMIS semantic component	Sample value(s)
Name of normalization tool	Agent	3.2 agentName	none	FFmpeg version SVN-r19352-4:0.5+svn20090706-2ubuntu2.2
Event description	Event	2.2 eventType	none	Normalizing
Processing status	Event	2.5 eventOutcomeInformation	2.5.1 eventOutcome	Processing completed
Normalization result	Event	2.5.2 eventOutcomeDetail	2.5.2.1 eventOutcomeDetailNote	Already in preservation format. No need to normalize. No default normalization tool defined. Output #0, wav, to '/tmp/MultimediaSIP-9ece5881-640e-4bdc-9863-4ff50046a0bd/objects/sample.wav': Stream #0.0: Audio: pcm_s16le, 8000 Hz, stereo, s16, 256 kb/s
Source: /data/logs/MD5checksum.txtprepareAIP_check.log
Process: Produced after file normalization process. Checks that checksums for files in the SIP have not changed during normalization.
Description	PREMIS entity	PREMIS semantic unit	PREMIS semantic component	Sample value(s)
Pass/fail notification	Event	2.5 eventOutcomeInformation	2.5.1 eventOutcome	PASSED FAILED
Source: /data/logs/AIP.MD5checksum.txt
Process: Produced during BagIt process. Provides checksums for the AIP and for each original and normalized file in the AIP.
Description	PREMIS entity	PREMIS semantic unit	PREMIS semantic component	Sample value(s)
AIP checksum	Object	1.5.2 Fixity	1.5.2.2 messageDigest	12b86e038bf0bddd5aba110c35f288b8
File checksum	Object	1.5.2 Fixity	1.5.2.2 messageDigest	326e0206ae83f815e4be5f28464f6ac6

Mandatory PREMIS elements (Mandatory semantic units + components)

Semantic unit	Semantic component	Present in Archivematica?
1.1 objectIdentifier	1.1.1 objectIdentifierType	No
1.1 objectIdentifier	1.1.2 objectIdentifierValue	Yes
1.2 objectCategory	none	No
1.5 objectCharacteristics	1.5.1 Composition level	No
1.5.4 format	1.5.4.1.1 formatName	Yes
1.7 Storage	Either 1.7.1 contentLocation or 1.7.2 storageMedium must be used	No

Mandatory PREMIS elements (Optional semantic units + mandatory components)

Some semantic units in PREMIS are optional, but if they are included they have mandatory elements. This table lists optional semantic units that are present in Archivematica in order to determine whether the mandatory elements are included.

Optional semantic unit	Mandatory semantic component	Present in Archivematica?
1.5.2 fixity	1.5.2.1 messageDigestAlgorithm	No
1.5.2 fixity	1.5.2.2 messageDigest	Yes
1.5.4.2 formatRegistry	1.5.4.2.1 formatRegistryName	No
1.5.4.2 formatRegistry	1.5.4.2.2 formatRegistryKey	Yes