Automatic pagination based on file names

This is a technical documentation for the plugin to automatically create a

Overview

Name	Wert
Identifier	intranda_step_imagename_analyse
Repository	https://github.com/intranda/goobi-plugin-step-analysis-imagename
Licence	GPL 2.0 or newer
Last change	15.08.2024 06:28:53

Introduction

This documentation describes the installation, configuration and use of the plugin. This plugin can be used to automatically prepare METS-files, create a basic structure and set a pagination.

Installation

The plugin consists of two files:

plugin_intranda_step-imagename-analyse-base.jar
plugin_intranda_step_imagename_analyse.xml

The file plugin_intranda_step-imagename-analyse-base.jar contains the program logic and must be installed to the tomcat user readable in the following directory:

/opt/digiverso/goobi/plugins/step/

The file plugin_intranda_step_imagename_analyse.xml must also be readable by the tomcat user and installed into the following directory:

/opt/digiverso/goobi/config/

Overview and functionality

Once the plugin has been installed and configured, it can be used by Goobi within a single step.

To do this, the intranda_step_imagename_analyse plugin must be selected within the desired task. In addition, the Automatic task checkbox must be set.

Selection of the plugin for performing the step

The way the plugin works within the correctly configured workflow looks like this:

• If the plugin was called within the workflow, it opens the METS file and first checks whether a pagination already exists.

• If this is the case, based on the configured value in skipWhenDataExists the step is either completed without further changes or the existing pagination and structuring is removed from the METS file.

• Then the files are read from the master folder and sorted alphanumerically.

• For each file it is now checked whether it corresponds to the configured regular expression.

• If this is the case, a new page is created. The physical order corresponds to the sorting in the file system, the logical page number is taken from the first group of the regular expression.

• If the regular expression does not apply, the system then runs through the list of configured items and checks whether the file name ends with the expression followed by an optional number and an optional recto-verso specification (r or v). If this is the case, the configured structural element is created and the page is assigned to this element. By specifying a count, new structural elements of the same type can be defined. If two or more files have no count or the same count, they are assigned to the same structural element.

• If neither the regular expression nor the list of structural elements apply to the file names, a page with the logical sorting "uncounted" is created and an entry is written in the process log.

Configuration

The configuration file plugin_intranda_step_imagename_analyse.xml used to configure the plugin and must have the following structure:

<?xml version="1.0" encoding="UTF-8"?>
<config>
    <skipWhenDataExists>false</skipWhenDataExists>

    <paginationRegex>.*_(\d+\w?[rv]\w?)\.\w+</paginationRegex>

    <structureList>
        <item filepart="ER" docstruct="RearCover" />
        <item filepart="SV" docstruct="FrontSection" />
        <item filepart="VD" docstruct="FrontCover" />
        <item filepart="HD" docstruct="BackCover" />
        <item filepart="VS" docstruct="Endsheet" />
        <item filepart="NS" docstruct="Postscript" />
        <item filepart="FR" docstruct="Fragment" />
        <item filepart="Fragm" docstruct="Fragment" />
    </structureList>
</config>

The element skipWhenDataExists defines how the plugin behaves if a pagination already exists. With the value true the execution is skipped, with false the existing structure and pagination is removed and a new one is created.

The element paginationRegex contains a regular expression which tries to extract the logical page number from the filename. The value from the first group is copied to the METS file.

If the regular expression was not successful, the system then checks whether the file name describes a special structure such as Cover, Titlepage or Contents. This structure is defined within structureList. A (partial) string, which must occur in the file name, is defined within the item element in the filepart attribute. In the docstruct attribute, the structural element is defined that is to be created in this case.

Samples

The following examples are based on the configuration defined above:

Filename	Output
BxSem-A02_010v.tif	Page 010v
BxSem-A02_146r.tif	Page 146r
BxSem-A02_NSr.tif	first page of the Postscript structural element
BxSem-A02_NSv.tif	second page of the Postscript structural element
BxSem-B04_Farbkarte_Einband.jpg	not configured, therefore no assignment possible, is taken over as "uncounted"
BxSem-A22_VS1r.jpg	first end sheet, first page
BxSem-A22_VS1v.jpg	first end sheet, second page
BxSem-A22_VS2.jpg	second end sheet
BxSem-B08_SV.jpg	single picture of the FrontSection