ISO/IEC 23000-15:2016/Amd 1:2017

Information technology - Multimedia application format (MPEG-A) - Part 15: Multimedia preservation application format - Amendment 1: Implementation guidelines for MP-AF

Technologies de l'information — Format pour application multimédia (MPEG-A) — Partie 15: Format pour application de la conservation des multimédias — Amendement 1: Lignes directrices pour MP-AF

General Information

• Status: Published
• Publication Date: 03-Jan-2017
• ICS: 35.040 - Information coding
• ICS: 35.040.40 - Coding of audio, video, multimedia and hypermedia information
• Technical Committee: ISO/IEC JTC 1/SC 29 - Coding of audio, picture, multimedia and hypermedia information
• Drafting Committee: ISO/IEC JTC 1/SC 29 - Coding of audio, picture, multimedia and hypermedia information
• Current Stage: 6060 - International Standard published
• Start Date: 04-Jan-2017
• Due Date: 28-Jul-2018
• Completion Date: 28-Jul-2018

Relations

• Amends: ISO/IEC 23000-15:2016 - Information technology - Multimedia application format (MPEG-A) - Part 15: Multimedia preservation application format
• Effective Date: 17-Jul-2021

Overview

ISO/IEC 23000-15:2016/Amd 1:2017 is an amendment to ISO/IEC 23000‑15 (MPEG‑A Part 15) that provides non‑normative implementation guidelines for the Multimedia Preservation Application Format (MP‑AF). The amendment explains how MP‑AF can be used in real‑world digital preservation workflows, includes three concrete use cases (format migration outsourcing, audiovisual digitization at RAI, and vinyl/tape digitization at Japan’s National Diet Library), and supplies complete MP‑AF XML examples and electronic XML inserts. Keywords: ISO/IEC 23000‑15, MP‑AF, MPEG‑A, multimedia preservation, implementation guidelines.

Key topics and technical requirements

• MP‑AF metadata model: Describes PreservationObject, Representations, Essence/Components, and descriptors for preservation metadata.
• Preservation descriptors: Standard descriptors used in MP‑AF-Fixity, Integrity, Rights, Quality, TechnicalMetadataDescriptor, and DescriptiveMetadataDescriptor-to capture preservation information at object and bitstream levels.
• Process and provenance metadata: Activity and Operator elements record ingest, rewrapping, transcoding, quality control and tools used. Useful for audit trails and reproducibility.
• XML serialization: Complete MP‑AF XML examples validating against the MP‑AF XSD; uses MPEG‑21 DIDL and namespaces like MPEG‑7, EBUcore and IPMP info.
• OAIS terminology: Uses Submission Information Package (SIP) and Dissemination Information Package (DIP) concepts to align with archival practice.
• Format validation and quality control: Guidance on logging format compliance, checksums (MD5, SHA1), component‑level fixity, and automated validation tool results.
• Packaging of essences and metadata: How to tie media files (essences) to MP‑AF metadata for ingestion, migration, and delivery.

Practical applications and users

Who benefits:

• Digital archivists and preservation managers implementing standardized preservation metadata and workflows.
• Broadcast organizations and media archives (e.g., RAI) documenting digitization and migration of audiovisual assets.
• National libraries and cultural heritage institutions performing mass digitization of analog media (vinyl, tapes).
• Third‑party preservation providers and vendors offering format migration, QA, and preservation services.
• Software developers and integrators building MP‑AF‑aware ingestion, validation, and packaging tools.

Practical uses:

• Recording provenance and tool configurations during format migration.
• Ensuring fixity and integrity across ingest and delivery (SIP/DIP).
• Packaging descriptive, technical and rights metadata with media files for long‑term preservation and distribution.
• Generating compliant MP‑AF XML documents for archival exchange and auditing.

Related standards

• ISO/IEC 23000 (MPEG‑A family)
• OAIS (Open Archival Information System) terminology
• MPEG‑21 DIDL, MPEG‑7, EBUcore metadata
• SMPTE standards (MXF format references)
• ISO 3166 (country codes), ISAN (work identifiers)

This amendment is a practical supplement to MP‑AF, offering real use cases, XML samples and integration guidance to help archives, broadcasters, and preservation vendors implement interoperable multimedia preservation workflows. Keywords: multimedia preservation, MP‑AF XML, preservation metadata, format migration, digital archiving.

Standards Content (Sample)

INTERNATIONAL ISO/IEC
STANDARD 23000-15
First edition
2016-07-15
AMENDMENT 1
2017-01
Information technology — Multimedia
application format (MPEG-A) —
Part 15:
Multimedia preservation application
format
AMENDMENT 1: Implementation
guidelines for MP-AF
Technologies de l’information — Format pour application multimédia
(MPEG-A) —
Partie 15: Format pour application de la conservation des
multimédias
AMENDEMENT 1: Lignes directrices pour MP-AF
Reference number
ISO/IEC 23000-15:2016/Amd.1:2017(E)
©
ISO/IEC 2017
ISO/IEC 23000-15:2016/Amd.1:2017(E)

© ISO/IEC 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO/IEC 2017 – All rights reserved

ISO/IEC 23000-15:2016/Amd.1:2017(E)

Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are
members of ISO or IEC participate in the development of International Standards through technical
committees established by the respective organization to deal with particular fields of technical
activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international
organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the
work. In the field of information technology, ISO and IEC have established a joint technical committee,
ISO/IEC JTC 1.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment,
as well as information about ISO’s adherence to the World Trade Organization (WTO) principles in the
Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.
Amendment 1 to ISO/IEC 23000-15:2016 was prepared by Technical Committee ISO/IEC JTC 1,
Information technology, SC 29, Coding of audio, picture, multimedia and hypermedia information.
© ISO/IEC 2017 – All rights reserved iii

ISO/IEC 23000-15:2016/Amd.1:2017(E)
Information technology — Multimedia application format
(MPEG-A) —
Part 15:
Multimedia preservation application format
AMENDMENT 1: Implementation guidelines for MP-AF
Page 57, Clause 7
Insert Clause 8 and Clause 9
8  Implementation guidelines (non-normative)
8.1 General
8.2 to 8.4 provide an overview of three concrete use cases from professional digital preservation
stakeholders. Their workflows and most relevant metadata are introduced, then MP-AF XML
implementations addressing preservation needs from real-world use cases are reported. Terminology
[4]
from Open Archival Information System (OAIS) is used, which defines information packages (IP) at
the ingest (Submission IP - SIP) and delivery (Dissemination IP - DIP) side of a preservation system.
A typical format migration use case is presented in 8.2, which showcases a common necessity in
digital preservation workflows. 8.3 focuses on “Audiovisual Digitization” scenario based on a concrete
project that is currently under deployment at RAI Radiotelevisione Italiana (i.e. the National Italian
Broadcaster). 8.4 deals with digitization of audio content of Short Play (SP) vinyl records and Master
1/2 inch tapes, a concrete activity performed at National Diet Library (NDL) of Japan. MP-AF compliant
XML documents are reported entirely within source code boxes in this document and also included as
separated XML files in the electronic inserts.
8.5 discusses the use of MP-AF in content archival and packaging (i.e. how to tie essences and metadata
together).
8.2  Outsourcing format migration use case
8.2.1 General
This is a generic use case about basic format migration activities. Let’s suppose that the organization
Fred&Alice Limited conceived, commissioned and/or produced an audiovisual work, e.g. a documentary
about the rivers, mountains, and sites of the region where Fred was born. The Work is titled “Fred’s
places” for which Fred&Alice Limited obtained an ISAN identifier, such as ISAN-XXXX-YYYY-ZZZZ. The
Work is composed of two parts stored in two HD-XDCAM MXF (50 Mbits/s) files. The first part has
a time length of 37 min and the second part of 23 min, representing the first and second part of the
content. Fred&Alice Limited now needs another representation of the Work as DVD ISO image file for 1
hour of playback, to be later printed on DVDs and commercialized. They decided to rely on an external
company, ACME Preservation for performing the format migration. Additionally, they are asking
information regarding the quality control of the resulting essences and a complete documentation of
media processing activities.
In the following we describe:
— the activities undertaken within the format migration process including the description of
agents/tools and operators;
ISO/IEC 23000-15:2016/Amd.1:2017(E)

— the specific preservation information created in this scenario, which can be represented by specific
MP-AF preservation descriptors like Fixity, Integrity and Rights.
8.2.2  Process overview
Fred&Alice Limited send to “ACME Preservation” a digital copy of the material, including the checksums
of the involved files. ACME Preservation run an ingest process, verifying the fixity and the integrity
of files by checksum calculation and comparison with the provided values. Ingestion also includes a
format validity check, done by using an automatic tool. ACME Preservation discover that MXF files are
not strictly compliant with some parts of the relevant SMPTE standard specifications, even if they can
be correctly played in practical environments.
ACME Preservation inform Fred&Alice Limited about this minor problem and propose to fix it
performing a simple file trans-wrapping. Fred&Alice Limited accept this proposal and also ask for the
two parts of the programme to be merged in order to have a single MXF file as output.
The following metadata documenting this first part of the process is saved:
— date and venue of the operations;
— the software tool that detected the SMPTE compliance problem;
— the software tool used for performing the merging and trans-wrapping operation;
— tool used for validating the result of the trans-wrapping;
— the location of media files that represent the input and the result of the trans-wrapping operation;
— the time required for executing the trans-wrapping operation.
Table 8 summarizes the sequence of activities carried out. The columns represent the respective
responsibilities of each organization.
Table 8 — Sequence of activities
Activity Fred&Alice Limited ACME preservation
1 DIP creation including essences and
required metadata in MP-AF format
2 Conformance checking of the container with
identification of possible violations
3 Merging files constituting multiple parts of the same
programme; fixing of MXF wrapper in case of SMPTE
standards violations, with logging of the operation in
MP-AF format
4 Transcoding of essence to the target coding schemes
with logging of the operation in MP-AF format
5 Quality control (i.e. formal check) of the resulting file
with logging of the operation results in MP-AF format
6 Ingestion of the updated SIP containing the
transcoded and trans-wrapped essence and
the updated MP-AF metadata
First, Fred&Alice Limited create the DIP to be delivered to ACME Preservation. It contains the following
main entities:
— the essence files;
— the relevant metadata in MP-AF XML format with:
— a DescriptiveMetadataDescriptor containing basic descriptive metadata at preservation
object level;
2 © ISO 2017 – All rights reserved

ISO/IEC 23000-15:2016/Amd.1:2017(E)

— the description of the representation (XDCAM in MFX) already available with Essence/Components
(i.e. related to the first and second part of the video programme);
— TechnicalMetadataDescriptors containing technical metadata at preservation object and
essence/bitstream level.
In the second stage, ACME Preservation receives the DIP and performs the requested
migration/transcoding including quality control activities. Most importantly, ACME Preservation
updates the MP-AF XML metadata document by adding the new representation given by the ISO image
of the work. The package delivered by ACME Preservation to Fred&Alice Limited includes the following:
— a PreservationObject with two representations:
— the old representation: two essences, each with a/v streams (no locators, as essence is not
included);
— the new representation: one essence with a/v streams (includes the locator of essence);
— TechnicalMetadataDescriptor containing technical metadata at preservation object and
essence/bitstream level;
— DescriptiveMetadataDescriptor containing basic descriptive metadata at preservation object level;
— QualityMetadataDescriptor containing quality metadata for old representations;
— process metadata (i.e. description and configurations of the tools used in the process) documenting
the derivation of the new representation;
— QualityMetadataDescriptor containing quality metadata for the new representation being assessed
by ACME Preservation.
Figure 18 shows a logical representation of the MP-AF document including the updates from ACME
Preservation, reflecting the activities performed and the produced outputs. This updated MP-AF
instance is delivered back to the Fred&Alice Limited’s archive, together with the freshly created DVD
ISO files.
ISO/IEC 23000-15:2016/Amd.1:2017(E)

Key
D descriptor Ident. identification
DS description scheme Descr. descriptive metadata
QA analysis Tech. technical metadata
Figure 18 — Structure of MP-AF document delivered to Fred&Alice Limited
8.2.3  Preservation Information
8.2.3.1  General
Pre-existing and newly created preservation metadata created by ACME Preservation, are stored in
MP-AF making use of the following specific descriptors:
8.2.3.2  Fixity
Fred&Alice Limited originally recorded the checksum (MD5) of all three provided files, which enables
the verification of their fixity, ensuring that no bit changes have occurred. For a more robust check, they
decided to add an alternative checksum (SHA1). Also they decide to store distinct checksum values for
each component (video and audio) and for each video segment along the timeline.
NOTE The MP-AF Fixity Descriptor supports multiple checksums representations separately for each
essence/component.
8.2.3.3  Integrity
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ISO/IEC 23000-15:2016/Amd.1:2017(E)

Fred&Alice Limited is concerned about the fact that one of the two MXF files could get lost and one could
be unaware that a part of the whole programme is missing (i.e. treating the file as a shorter version of
the programme).
Fred&Alice Limited is tempted to concatenate the two files, but the operators are not sure about the
technical quality of the result, so they keep the original parts in separate files.
NOTE MP-AF allows providing information that guarantees the integrity by means of an Integrity Descriptor,
linked to specific Representations of the Preservation Object.
8.2.3.4  Rights
Fred&Alice Limited are the original producers of “Fred’s places” and they hold all the rights including
the exploitation. They also have
— a document with free text description of the work,
— emails exchanged with other companies having technically contributed to the production, and
— the document for the request of ISAN registration.
One year ago, they granted exclusive rights to “Mountains and Rivers Entertainment Limited” for
performing any kind of communication to the public and on any public performances in the country
1)
“Italy” [“ITA”, ISO country code: 380 ]. The material delivered to “Mountains and Rivers Entertainment
Limited” were created by means of transcoding from the MXF files, but no copy of it was kept by
Fred&Alice Limited.
NOTE MP-AF allows providing such information through the Rights Descriptor linked to the specific
Representation.
8.2.3.5  Quality
ACME Preservation performs file format compliance checks for the produced files. This results in a
report containing the checks performed and the outcome reported by the automatic quality analysis
tools. The XML report includes only few recommended tests for MXF wrapper consistency, but many
others can be added.
1) ISO 3166-1 numeric.
ISO/IEC 23000-15:2016/Amd.1:2017(E)

8.2.4  XML Serialization of MP-AF Metadata
This subclause provides a complete XML serialization of MP-AF Metadata that formally validates
against the normative schema provided by the standard. Useful comments are provided inline.
tion:2015ʺ xmlns:didmodel=ʺurn:mpeg:mpeg21:2002:02-DIDMODEL-NSʺ xmlns:mpeg7=ʺurn:mpeg:mpeg7:sche-
ma:2004ʺ xmlns:dii=ʺurn:mpeg:mpeg21:2002:01-DII-NSʺ xmlns:dc=ʺhttp://purl.org/dc/elements/1.1/ʺ
xmlns:ebucore=ʺurn:ebu:metadata-schema:ebuCore_2014ʺ xmlns:xsi=ʺhttp://www.w3.org/2001/XMLSchema-in-
stanceʺ xmlns:ipmpinfo=ʺurn:mpeg:mpeg21:2004:01-IPMPINFO-NSʺ xmlns:didl=ʺurn:mpeg:mpeg21:2002:02-
DIDL-NSʺ xsi:schemaLocation=ʺurn:mpeg:maf:schema:preservation:2015 mpaf.xsd urn:mpeg:mpeg21:2002:02-
DIDL-NS mpeg21/did/didl.xsdʺ>




http://my.org/qc/tool1







my.org/people/doeʺ>http://my.org/qc/tool2







http://acme.org/qc/tool4 Operator>




http://acme.org/qc/tool3 Operator>






http://acme.org/qc/tool4 Operator>



ervation:ToolCS:2015:pt25ʺ/>

6 © ISO 2017 – All rights reserved

ISO/IEC 23000-15:2016/Amd.1:2017(E)

ervation:ToolCS:2015:pt18ʺ/>

ervation:ToolCS:2015:pt35ʺ/>

ervation:ToolCS:2015:pt14ʺ/>

f:cs:preservation:AgentTypeCS:2015:pat12ʺ>

John
Doe








urn:smpte:umid:060A2B-
340101010501010D12130000000123456789ABCDEF0123456789ABCDEF







http://www.w3.org/2001/04/xmlenc#aes128










urn:smpte:u-
mid:060A2B3401010 10501010D12130000000123456789ABCDEF0123456789ABCDEF








Audiovisual


ISO/IEC 23000-15:2016/Amd.1:2017(E)








abc123









Digital video format






















abc124












8 © ISO 2017 – All rights reserved

ISO/IEC 23000-15:2016/Amd.1:2017(E)





















urn:smpte:umid:060A2B3401010
10501010D12130000000123456789ABCDEF0123456789ABCDEF
















abc567














ISO/IEC 23000-15:2016/Amd.1:2017(E)





tionCS#qualitymeasuresʺ>


Video and Audio quality annotations made automati-
cally







1.0 mpeg7:RatingValue>








edʺ>OP1a




512 putParameter>




-
Closed/Complete
-
Closed/Complete
-
Closed/Complete





Operational Pattern

True
complete
automatic
10 © ISO 2017 – All rights reserved

ISO/IEC 23000-15:2016/Amd.1:2017(E)




KAG Size

True
complete
automatic



Partition Status

True
complete
automatic




















urn:smpte:umid:060A2B3401010
10501010D12130000000123456789ABCDEF0123456789ABCDEF
















ISO/IEC 23000-15:2016/Amd.1:2017(E)

abc567





























Figure 19 — MP-AF XML representation of format migration example
8.3  Audiovisual Digitization Use Case
8.3.1  General
At the date of writing, RAI is undertaking a strategic internal project with the aim of digitizing its whole
historical archive. This operation is done by moving the audio-visual content from old media carriers
(e.g. Betacam tapes and 16 mm films) to master high quality files. Besides the essence, metadata have
to be preserved with a special attention to technical and process metadata. This document does not dig
into the details of the whole processing workflow or the technical aspects of the employed software
tools. It focuses on describing the main metadata output that RAI intends to preserve and their
collocation inside the MP-AF standard. The related MP-AF XML serialization included in this document
is not to be understood as a final and complete version in use at RAI.
8.3.2  Process overview
Content migration is a complex process that includes a wide set of interdependent activities operated either
automatically by specific software and devices or manually by specialized technicians and operators.
Figure 20 shows briefly the main activities involved in a simplified version of the workflow adopted in
RAI, in this picture the temporal sequence of actions is represented from left to right. Each activity is
summarized in 8.3.3, with specific focus on generated metadata and their representation in MP-AF.
12 © ISO 2017 – All rights reserved

ISO/IEC 23000-15:2016/Amd.1:2017(E)

Material Physical
Trans- Quality
selection and Veriication and
Digitization coding Control
Identiication Preparation
Figure 20 — Simplified migration workflow
8.3.3  Preservation metadata along the processing chain
8.3.3.1  General
Making reference to Figure 20, the following subclauses briefly describe each activity and related
produced metadata to be represented and preserved inside MP-AF.
8.3.3.2   Material selection and identification
In this phase, the analogue material is selected taking into account given priorities, numbers of copies
and kind of original media available, rights, etc. The Selection and Identification is typically performed
relying on the available information in legacy databases, collected metadata are related mostly to the
identification of the editorial items stored on the media and their rights.
The MP-AF descriptors used for representing this information are
— IdentificationDescriptor for unique identification,
— ContextDescriptor for the description of the context (the RAI archives digitization project), and
— ExploitationRightsDescriptor for describing existing rights.
8.3.3.3   Physical verification and preparation
In this phase, a human operator (agent) checks the physical condition of the media and prepares it for
the digitization (i.e. applying a barcode to a cassette needed for the following automation processes or
repairing the splices in a film).
This phase is tracked in terms of recording who made the operation and/or the tools used (e.g. a
Betacam cleaner). Additionally, some technical metadata are verified/completed here like the size and
duration of the cassette if these are not available from the previous processing step.
Technical metadata is placed in TechnicalMetadataDescriptor, while the report from the cleaner is
referenced as an external file. It is supposed that in this phase, the operator also checks the authenticity
of the content, the result of this evaluation is stored within the AuthenticityDescriptor.
ISO/IEC 23000-15:2016/Amd.1:2017(E)

8.3.3.4  Digitization
8.3.3.4.1 General
Within this activity, the analogue audio-visual signals are translated into digital form and recorded
on a master file in a predefined format. The digitization is at the core of the entire process and is very
important to ensure the usage of high quality tools in order to guarantee the maintenance of original
audio and video quality. Betacam cassettes are digitized using proper VTRs, in this case the monitoring
of radio frequency (RF) levels is a key activity for verifying if the magnetic heads read the original tape
correctly. In case of problems, the tape can be reworked for example using a different VTR, cleaning the
heads or even by performing a physical restoration of the tape. The collected RF signal information is of
a large size. Basically, a value for luminance and for chrominance per each video field/frame is recorded;
therefore this is not suitable to be serialized directly in the XML report, being stored in an external text
file, referenced inside MP-AF QualityDescriptor. Other useful metadata represented inside this example
include the date and the location of digitization, the identification of the robotic line performing the
digitization and the specific VTR being used for playing the tape. The relation between the produced
master file and the original media is described within the ProvenanceDescriptor. The master file is
checksummed globally and for each frame. This information is preserved using a FixityDescriptor.
8.3.3.4.2  Transcoding
2)
In this phase, a transcoder tool (e.g. the open source tool ffmpeg ) derives from the master file a proxy
representation with lower bitrate to be used by following activities for indexing and previewing. The
name and version of the transcoding tool is preserved together with all the parameters used for the
operation (e.g. the configuration of audio channels, the target bitrate and resolution, etc.). The proxy
itself is matter of preservation and constitutes a further MP-AF Representation.
8.3.3.4.3  Assisted quality control
In this activity, audio and video technicians check the quality of the content from the master file, helped
by automatic measures gathered in previous phases like the VTR RF signals. More precisely operators
are requested to check the correctness of the aspect ratio, the global video and audio quality, and to
annotate video and audio defects along the timeline.
The quality control checklist (i.e. what to check and how) can be specified following the formal
3)
definition of QCItems provided by the EBU Quality Control group.
To complete check of all the programmes is time consuming, therefore RAI decided to reduce it to
specific intervals covering a percentage of the duration. The results and annotations are preserved
inside the MP-AF QualityDescriptor that makes use of ISO/IEC 15938-5:2003/Amd 5:2015 and the
ExtendedMediaQualityType definition.
In this phase, the user additionally checks the completeness of the content, the result of this assessment
is stated and preserved inside a descriptor of type IntegrityDescriptorType.
8.3.4  MP-AF XML serialization
This subclause reports a complete (yet not exhaustive) XML serialization of MP-AF metadata that
formally validates against the last version of the normative schema provided by the standard. Useful
comments are provided inline.
The mpaf:DIDLInfo element contains all the process-related information including the list of Operators
(i.e. Agents and Tools) and the relevant Activities (i.e. as described in previous clauses). Each activity
reports what is used as input and what is produced as output. For example, the Digitization activity
uses the Betacam tape and creates the master MXF file and the plain text metadata file with the
VTR RF measures. The top-most mpaf:Item element describes the object of preservation (i.e. the
2) http://ffmpeg.org/
3) http://www.ebu.io/qc/item
14 © ISO 2017 – All rights reserved

ISO/IEC 23000-15:2016/Amd.1:2017(E)

editorial entity or programme having attribute type=“PreservationObjectType”). This aggregates the
three Representations: the original media (i.e. in this case a Betacam cassette), the master quality
MXF-D10 file resulting from digitization and the MPEG-4 AVC proxy file derived from the master. The
ContextDescriptor, AuthenticityDescriptor and ExploitationRightsDescriptor are also attached to the
Preservationobject. The representation of the original cassette contains an IntegrityDescriptor, while
for the master file three descriptors are attached (i.e. an IntegrityDescriptor, a FixityDescriptor and a
QualityDescriptor).
Figure 21 shows the logical representation of the MP-AF document with the above mentioned structure,
the XML serialization follows immediately after.
Figure 21 — Structure of MP-AF document used by RAI


tion:2015ʺ xmlns:mpaf=ʺurn:mpeg:maf:schema:preservation:2015ʺ xmlns:dc=ʺhttp://purl.org/dc/ele-
ments/1.1/ʺ xmlns:ebucore=ʺurn:ebu:metadata-schema:ebuCore_2015ʺ xmlns:mpeg7=ʺurn:mpeg:mpeg7:sche-
ma:2004ʺ xsi:schemaLocation=ʺurn:mpeg:maf:schema:preservation:2015 mpaf.xsdʺ>




uri=ʺhttp://identifiers.rai.it/digimaster/line1/taperecorder1ʺ>


The model of video recorder (with eVTR extension), used for digitization



Sony MSW-A2000


uri=ʺhttp://identifiers.rai.it/digimaster/line1/cleaner1ʺ>

ISO/IEC 23000-15:2016/Amd.1:2017(E)


Preparation tools/Cleaner


TC-matic


uri=ʺhttp://identifiers.rai.it/digimaster/line1/proxy_encoderʺ>
...