mets-mods2tei

Convert bibliographic meta data in METS/MODS format to TEI headers and optionally serialize linked ALTO-encoded OCR to TEI text.

Background

MODS is the de-facto standard for encoding bibliographic meta data in libraries. It is usually included as a separate section into METS XML files. Physical and logical structure of a document are expressed in terms of structural mappings (structMap elements).

TEI is the de-facto standard for representing digital text for research purposes. It usually includes detailed bibliographic meta data in its header.

Since these standards contain a considerable amount of degrees of freedom, the conversion uses well-defined subsets. For MODS, this is the MODS Anwendungsprofil für digitalisierte Medien. For METS, the METS Anwendungsprofil für digitalisierte Medien 2.1 is consulted. For the TEI Header, the conversion is roughly based on the DTA base format.

mets-mods2tei is developed at the Saxon State and University Library in Dresden.

Installation

mets-mods2tei is implemented in Python 3. In the following, we assume a working Python 3 (tested versions 3.5, 3.6 and 3.7) installation.

Setup Python

Using virtual environments is highly recommended, although not strictly necessary for installing mets-mods2tei.

To create a virtual environement in a subdirectory of your choice (e.g. env), run

python3 -m venv env

(once) and then activate it (each time you open the shell) via

. env/bin/activate

Depending on how old the packages are which your base system provides, you might have to update pip first:

pip install -U pip setuptools

Get Python package

mets-mods2tei can be installed via pip3 directly. You can install from either the repository sources or the prebuilt distribution on PyPI:

From repository

If you have an active virtual environment, do

pip install mets-mods2tei

Otherwise, try

pip3 install --user mets-mods2tei

From source

Get the repository:

git clone https://github.com/slub/mets-mods2tei.git
cd mets-mods2tei

If you have an active virtual environment, do

pip install .

Otherwise, try

pip3 install --user .

Testing

mets-mods2tei uses pytest-based testing.

To install the prerequisites for testing, (in your venv), do

pip install -r requirements-test.txt

(once) and then run the tests via:

pytest

Code coverage

Determine code coverage by running

make coverage

Usage

mm2tei

Installing mets-mods2tei makes the command-line tool mm2tei available:

mm2tei --help

Usage: mm2tei [OPTIONS] METS

  METS: File containing or URL pointing to the METS/MODS XML to be converted

  Parse given METS and its meta-data, and convert it to TEI.

  If `--ocr` is given, then also read the ALTO full-text files from the
  fileGrp in `--text-group`, and convert page contents accordingly (in
  physical order).

  Decorate page boundaries with image and page numbers. Moreover, if `--add-
  refs` contains `page`, then reference the corresponding base image files (by
  file name) from `--img-group`. Likewise, if `--add-refs` contains `line`,
  then reference the corresponding textline segments (by XML ID) from `--text-
  group`.

  Output XML to `--output (use '-' for stdout), log to stderr.`

Options:
  -O, --output FILENAME           File path to write TEI output to
  -o, --ocr                       Serialize OCR into resulting TEI
  -T, --text-group TEXT           File group which contains the full-text
  -I, --img-group TEXT            File group which contains the images
  -r, --add-refs [page|line]
  -l, --log-level [DEBUG|INFO|WARN|ERROR|OFF]
  -h, --help                      Show this message and exit.

It reads METS XML via URL or file argument and prints the resulting TEI, including the extracted information from the MODS part of the METS.

Example:

mm2tei -O tei.xml "https://digital.slub-dresden.de/oai/?verb=GetRecord&metadataPrefix=mets&identifier=oai:de:slub-dresden:db:id-453779263"

mm-update

Installing mets-mods2tei also provides the command-line multi-cmd tool mm-update:

mm-update --help

Usage: mm-update [OPTIONS] COMMAND [ARGS]...

  Entry-point of multi-purpose CLI for DFG Viewer compliant METS updates

Options:
  --version                       Show the version and exit.
  -l, --log-level [OFF|ERROR|WARN|INFO|DEBUG|TRACE]
                                  Log level
  -d, --directory WORKSPACE_DIR   Changes the workspace folder location
                                  [default: METS_URL directory or .]"
  -m, --mets METS_URL             The path/URL of the METS file [default:
                                  WORKSPACE_DIR/mets.xml]
  --backup                        Backup METS whenever it is saved.
  --help                          Show this message and exit.

Commands:
  add-agent     add agent headers, optionally from external METS
  add-file      add a file reference, optionally as URL
  download      download files into subdirectories, as path or URL
  remove-file   remove all file references for a specific location,...
  remove-files  remove all file references for a specific fileGrp / MIME...
  validate      custom OcrdWorkspaceValidator

mm-update add-agent --help

Usage: mm-update add-agent [OPTIONS]

  add agent headers, optionally from external METS

Options:
  -m, --mets TEXT  copy metsHdr/agent from this file, too
  --help           Show this message and exit.

mm-update add-file --help

Usage: mm-update add-file [OPTIONS] PATH

  add a file reference, optionally as URL

Options:
  -G, --file-grp FILE_GRP  fileGrp to add to  [required]
  -m, --mimetype TYPE      Media type of the file. Guessed from extension if
                           not provided
  -g, --page-id PAGE_ID    ID of the physical page (or empty if document-
                           global)
  -u, --url-prefix TEXT    URL prefix to add to path before storing references
                           (or else keep local file refs)
  --help                   Show this message and exit.

mm-update remove-file --help

Usage: mm-update remove-file [OPTIONS] PATH

  remove all file references for a specific location, optionally as URL

Options:
  -u, --url-prefix TEXT  URL prefix to add to path before removing references
                         (or else search verbatim file refs)
  --help                 Show this message and exit.

mm-update remove-files --help

Usage: mm-update remove-files [OPTIONS]

  remove all file references for a specific fileGrp / MIME type / page ID
  combination

Options:
  -G, --file-grp FILE_GRP  fileGrp to add to  [required]
  -m, --mimetype TYPE      Media type of the file. Guessed from extension if
                           not provided
  -g, --page-id PAGE_ID    ID of the physical page (or empty if document-
                           global)
  --help                   Show this message and exit.

mm-update validate --help

Usage: mm-update validate [OPTIONS]

  custom OcrdWorkspaceValidator

Options:
  -u, --url-prefix TEXT  validate each file has this URL prefix
  --help                 Show this message and exit.

mm-update download --help

Usage: mm-update download [OPTIONS]

  download files into subdirectories, as path or URL

Options:
  -G, --file-grp FILE_GRP         fileGrp USE (or empty if all fileGrps)
  -g, --page-id PAGE_ID           ID of the physical page (or empty if all
                                  pages)
  -p, --path-names [URL|GRP/ID.SUF]
                                  how to generate local path names (from URL
                                  or from fileGrp, file ID and suffix)
                                  [default: URL]
  -u, --url-prefix TEXT           URL prefix to remove from path before
                                  storing downloaded files (to avoid creating
                                  host directories)
  -r, --reference [no-change|replace-by-local|insert-local|append-local]
                                  whether and how to update the FLocat
                                  reference in METS  [default: no-change]
  --help                          Show this message and exit.

Example:

# dump files (without changing METS):
mm-update download -u https://digital.slub-dresden.de/data/kitodo/GottDie_453779263/
...
# add TEI
mm-update add-file -G TEI -m application/tei+xml -u https://digital.slub-dresden.de/data/kitodo/GottDie_453779263/ tei.xml
...
# remove old PDF:
mm-update remove-files -G DOWNLOAD
# add new PDF:
mm-update add-file -G DOWNLOAD -m application/pdf -u https://digital.slub-dresden.de/data/kitodo/GottDie_453779263/ -g PHYS_0001 pdf/file_0001.pdf
mm-update add-file -G DOWNLOAD -m application/pdf -u https://digital.slub-dresden.de/data/kitodo/GottDie_453779263/ -g PHYS_0002 pdf/file_0002.pdf
mm-update add-file -G DOWNLOAD -m application/pdf -u https://digital.slub-dresden.de/data/kitodo/GottDie_453779263/ -g PHYS_0003 pdf/file_0003.pdf
mm-update add-file -G DOWNLOAD -m application/pdf -u https://digital.slub-dresden.de/data/kitodo/GottDie_453779263/ pdf/all.pdf
...
# remove old ALTO:
mm-update remove-files -G FULLTEXT -g PHYS_0001
mm-update remove-files -G FULLTEXT -g PHYS_0002
mm-update remove-files -G FULLTEXT -g PHYS_0003
# add new ALTO:
mm-update add-file -G FULLTEXT -m text/xml -u https://digital.slub-dresden.de/data/kitodo/GottDie_453779263/ -g PHYS_0001 ocr/alto_0001.xml
mm-update add-file -G FULLTEXT -m text/xml -u https://digital.slub-dresden.de/data/kitodo/GottDie_453779263/ -g PHYS_0002 ocr/alto_0002.xml
mm-update add-file -G FULLTEXT -m text/xml -u https://digital.slub-dresden.de/data/kitodo/GottDie_453779263/ -g PHYS_0003 ocr/alto_0003.xml
...
# validate:
mm-update validate -u https://digital.slub-dresden.de/data/kitodo/GottDie_453779263/

Maintainers

If you have any questions or encounter any problems, please do not hesitate to contact us.