Release Candidate

Profile: Material artwork

The Material artwork profile supports digital reproductions of artworks that are moveable material objects, often, but not always, displayed in or maintained by museums. This includes photographic registration of 2D artworks, such as paintings or drawings, in high and very high (gigapixel) resolution and high-polygon scans of 3D artworks, such as statues or sculptures.

This content profile specifies how to package different media files (e.g., TIFF, JPEG, OBJ or MTL), their metadata and the relationships between them in a meemoo SIP package. It also allows extensions to the descriptive metadata using Schema.org.

Permalink: https://data.hetarchief.be/id/sip/1.1/material-artwork

Example Directory structure

2D photoregistration

root_directory
│── manifest-md5.txt
│── bagit.txt
│
└── data
    │── mets.xml
    │── metadata
    |   |── descriptive
    |   |   └── dc+schema.xml
    |   └── preservation
    |       └── premis.xml
    │
    └── representations
        └──representation_1       # overview with frame
           │── mets.xml
           └──data
           │  └── PID_overzichtsopname_metlijst_tiff.tiff
           │
           └──metadata
              |── descriptive     (optional)
              |   └── dc+schema.xml
              └──preservation
                 └── premis.xml
        └──representation_2       # overview without frame
           │── mets.xml
           └──data
           │  └── PID_overzichtsopname_zonderlijst_tiff.tif
           │
           └──metadata
              |── descriptive     (optional)
              |   └── dc+schema.xml    
              └──preservation
                 └── premis.xml
        └──representation_3       # composed stitch 
           │── mets.xml
           └──data
           │  └── PID_stitch_tiff.tif
           │
           └──metadata
              |── descriptive     (optional)    
              |   └── dc+schema.xml    
              └──preservation
                 └── premis.xml
        └──representation_4       # stitch 
           │── mets.xml
           └──data
           |  |── PID_deelopname1_tiff.tif
           |  |── PID_deelopname2_tiff.tif
           │  └── ...
           │
           └──metadata
              |── descriptive     (optional)  
              |   └── dc+schema.xml    
              └──preservation
                 └── premis.xml

3D scan

root_directory
│── manifest-md5.txt
│── bagit.txt
│
└── data
    │── mets.xml
    │── metadata
    |   |── descriptive
    |   |   └── dc+schema.xml
    |   └── preservation
    |       └── premis.xml
    │
    └── representations
        └──representation_1       # high-poly capture for print
           │── mets.xml
           └──data  
           │  └── PID_ARCH_STL.STL              
           │
           └──metadata
              |── descriptive     (optional)
              |   └── dc+schema.xml
              └──preservation
                 └── premis.xml
        └──representation_2       # high-poly capture
           │── mets.xml
           └──data
           |  |── PID_ARCH_OBJ.OBJ       # polygon file    
           |  |── PID_ARCH_TIFF_COLOR.TIFF      # texture image       
           │  └── PID_ARCH_MTL.MTL              # texture mapping file
           │
           └──metadata
              |── descriptive     (optional)
              |   └── dc+schema.xml
              └──preservation
                 └── premis.xml
        └──representation_3       # low-poly capture
           │── mets.xml
           └──data
           |  |── PID_VER_OBJ.OBJ       # polygon file    
           |  |── PID_VER_COLOR_BMP.BMP             # texture image       
           │  └── PID_VER_MTL.MTL                   # texture mapping file
           │
           └──metadata
              |── descriptive     (optional)
              |   └── dc+schema.xml   
              └──preservation
                 └── premis.xml
        └──representation_4       # quality assessment reference
           │── mets.xml
           └──data
           |  |── PID_REF_OBJ.OBJ               # polygon file    
           |  |── PID_REF_BMP.BMP               # texture image      
           |  |── PID_REF_IJK_BMP.BMP           # reference texture image     
           │  └── PID_REF_MTL.MTL               # texture mapping file
           │
           └──metadata
              |── descriptive     (optional)
              |   └── dc+schema.xml    
              └──preservation
                 └── premis.xml

Requirements

General

There MUST be exactly one IE at the root. There MAY be other sub-IE’s that are part of the root IE or other sub-IE’s (e.g. to describe panels of a triptych individually).
There MUST be at least one representation, but there MAY be multiple: either containing different captures or resolutions of the same IE or representing a different IE.
Each representation MUST contain at least one file.
Preservation metadata MUST be limited to the PREMIS metadata schema.
There MUST be preservation metadata at the package level in the preservation/premis.xml file.
There MUST be preservation metadata at the representation level in the preservation/premis.xml file.
Only the MD5 hashing algorithm is allowed to compute the fixity, thus:
- The value of element premis:premis/premis:object[@xsi:type="premis:file"]/premis:objectCharacteristics/premis:fixity/premis:messageDigestAlgorithm MUST be set to MD5.
- The value of attribute premis:premis/premis:object[@xsi:type="premis:file"]/premis:objectCharacteristics/premis:fixity/premis:messageDigestAlgorithm/@valueURI MUST be set to "http://id.loc.gov/vocabulary/preservation/cryptographicHashFunctions/md5".

Package METS

The csip:CONTENTINFORMATIONTYPE attribute MUST be set to https://data.hetarchief.be/id/sip/1.1/material-artwork.
The TYPE attribute in the mets.xml file MUST be set to Physical object.
The mets/dmdSec/mdRef/@MDTYPE attribute MUST be set to OTHER.

Descriptive Metadata

A descriptive metadata file descriptive/dc+schema.xml describing the IE MUST be present at the package level.
A descriptive metadata file descriptive/dc+schema.xml describing the representation MAY be present at the representation level (eg. to indicate diverting licenses).
Descriptive metadata in descriptive/dc+schema.xml MUST apply the DCTERMS metadata schema and MAY also apply the SCHEMA metadata schema (see below).
The DCTERMS metadata MUST follow the basic profile requirements regarding the use of elements and attributes.
The SCHEMA metadata in descriptive/dc+schema.xml MUST be limited to the elements and attributes outlined below.

Element	`schema:creator`
Name	Creator artwork
Description	The creator/author of the digitally reproduced artwork.
Cardinality	0..*
Obligation	MAY

Attribute	`schema:creator/@roleName`
Name	Role creator
Description	The role with which the creator/author was involved in creating the digitally reproduced artwork.
Cardinality	0..1
Obligation	SHOULD

Element	`schema:creator/schema:name`
Name	Name creator
Description	The name of the creator.
Cardinality	1..1
Obligation	MUST

Element	`schema:creator/schema:birthDate`
Name	Birth date creator
Description	The creator’s date of birth.
Datatype	EDTF
Cardinality	0..1
Obligation	MAY

Element	`schema:creator/schema:deathDate`
Name	Death date creator
Description	The creator’s date of death.
Datatype	EDTF
Cardinality	0..1
Obligation	MAY

Element	`schema:height`
Name	Height artwork
Description	The measured height of the physical artwork.
Cardinality	0..1
Obligation	MAY

Element	`schema:width`
Name	Width artwork
Description	The measure width of the physical artwork.
Cardinality	0..1
Obligation	SHOULD

Element	`schema:depth`
Name	Depth artwork
Description	The measured depth of the physical artwork.
Cardinality	0..1
Obligation	SHOULD

Element	`(schema:height\|schema:width\|schema:depth)/schema:value`
Name	Value
Description	The height, width or depth measurement value.
Cardinality	1..1
Datatype	Integer
Obligation	MUST

Element	`(schema:height\|schema:width\|schema:depth)/schema:unitCode`
Name	Unit Code
Description	The unit of length measurement given using the UN/CEFACT Common Code (3 characters).
Vocabulary	`MMT`, `CMT`, `MTR`
Datatype	String
Cardinality	0..1
Obligation	SHOULD

Element	`(schema:height\|schema:width\|schema:depth)/schema:unitText`
Name	Unit Text
Description	A string or text indicating the unit of the height or width measurement value. Useful if you cannot provide a standard unit code for `schema:unitCode`.
Vocabulary	`mm`, `cm`, `m`
Datatype	String
Cardinality	0..1
Obligation	MUST

Element	`schema:artMedium`
Name	Art medium
Description	The material used to create the physical artwork, e.g. Oil, Watercolour, Acrylic, Linoprint, Marble, Cyanotype, Digital, Lithograph, DryPoint, Intaglio, Pastel, Woodcut, Pencil, Mixed Media, etc.
Datatype	String
Cardinality	0..1
Obligation	MAY

Element	`schema:artform`
Name	Artform
Description	The type of artform, e.g. Painting, Drawing, Sculpture, Print, Photograph, Assemblage, Collage, etc.
Datatype	String
Cardinality	0..1
Obligation	MAY

Validation

The XML files that are required by this profile can be validated using the following XML schema definitions:

File	Format	XML Schema
`mets.xml`	METS v1.12.1	mets.xsd
`premis.xml`	PREMIS v3.0	premis-v3-0.xsd
`dc+schema.xml`	Dublin Core with Schema.org	dc+schema.xsd (not yet available)

Use Cases

Some use cases that implement this profile are: