collective.vdexvocabulary 0.2

Configuration

In your configure.zcml add:

<configure
    ...
    xmlns:vdex="http://namespaces.zope.org/vdex"
    ...>

  <include package="collective.vdexvocabulary" file="meta.zcml" />
  <include package="collective.vdexvocabulary" />

And to register a vdex vocabulary simply add line bellow pointing to file containing vdex vocabulary:

<configure
    ...
    xmlns:vdex="http://namespaces.zope.org/vdex"
    ...>

  <vdex:vocabulary file="path-to/very-interesting.xml" />

or for tree vocabularies:

<vdex:treevocabulary file="path-to/very-interesting-tree.xml" />

To make registration of vocabularies even easier you can also register several vocabularies and just point to directory:

<configure
    ...
    xmlns:vdex="http://namespaces.zope.org/vdex"
    ...>

  <vdex:vocabulary directory="path-to/my-vdex-vocabularies" />

or for tree vocabularies:

<vdex:treevocabulary directory="path-to/my-vdex-vocabularies" />

vdex files in path-to/my-vdex-vocabularies directory should have ending .vdex to be recognized by vdex:vocabulary ZCML directive.

Sometimes you dont want VDEX-files inside your code tree. Therefore an environment variable can be given defining the base directory:

<vdex:vocabulary file="my-vocabulary.vdex: environment="VDEX_BASE_DIR" />

or for tree vocabularies:

<vdex:treevocabulary file="my-vocabulary.vdex: environment="VDEX_BASE_DIR" />

Before running the code with environment variable relative filenames/directories one has to set the environmant variable, i.e. do an export VDEX_BASE_DIR=/home/joe/vdex/ in order to make it look for the vdex at /home/joe/vdex/my-vocabulary.vdex.

Usage in Code

Vocabularies are named utiltiies in a zope-toolkit manner. The name is taken from the vdex file, its the vocabIdentifier.

Given a vocabulary with the name beeeurope (see tree example below) one has to get the utility using the zope component architecture way:

>>> from zope.component import getUtility
>>> from zope.schema.interfaces import IVocabularyFactory
>>> factory = zope.component.getUtility(IVocabularyFactory, 'beeeurope')

The factory returns on call a vocabulary. It expects a context, which can be None in our case. If you are in an application server pass here your current context. In case of flat vocabularies this is used to detect the language, for tree vocabularies it is ignored, here an more advanced method is used to support i18n:

>>> context = None
>>> vocabulary = factory(context)

Now you can use the vocabulary:

>>> for term in vocabulary:
...     print term.value
...     print term.token
...     print term.title
...     print term.description

How to use tree-vocabularies

Once looked up as shown above traversing the tree is easy. It works as defined in zope.schema.interfaces.ITreeVocabulary. The term is also the key for the sublevel:

>>> def printlevel(leveldict, ident=0):
...     for term in leveldict:
...         print indent * '  ' + term.title
...         printlevel(leveldict[term], indent+1)

Hint: collective.dynatree uses this kind of vocabularies and can be used as an example for own implementations too.

How to access relations (from code)

Relations are defined by ISO2788.

To get listing of BMW car models from above VDEX example you have to:

>>> from zope.schema.vocabulary import getVocabularyRegistry

>>> vr = getVocabularyRegistry()
>>> car_manufacturers = vr.get(self.context, 'your.package.car_manufacturers')
>>> car_models = vr.get(self.context, 'your.package.car_models')

>>> bmw = car_manufacturers.getTerm('bmw')
>>> bmw_car_models = bmw.related.get('NT', [])

Flat with with relations

Example of car manufacturers list (car_manufacturers.vdex).:

<?xml version="1.0" encoding="utf-8"?>
<vdex xmlns="http://www.imsglobal.org/xsd/imsvdex_v1p0"
      orderSignificant="false" language="en">
    <vocabIdentifier>your.package.car_manufacturers</vocabIdentifier>
    <term>
        <termIdentifier>ford</termIdentifier>
        <caption>
            <langstring language="en">Ford</langstring>
            <langstring language="es">Una miedra de coche</langstring>
        </caption>
    </term>
    <term>
        <termIdentifier>bmw</termIdentifier>
        <caption>
            <langstring language="en">BMW</langstring>
            <langstring language="es">Be-eMe-uWe, mierda</langstring>
        </caption>
    </term>

    <relationship>
        <sourceTerm>bmw</sourceTerm>
        <targetTerm vocabIdentifier="your.package.car_models">very-special-bmw-model</targetTerm>
        <relationshipType source="http://www.imsglobal.org/vocabularies/iso2788_relations.xml">NT</relationshipType>
    </relationship>

    ...

</vdex>

List of car models (car_models.vdex).:

<?xml version="1.0" encoding="utf-8"?>
<vdex xmlns="http://www.imsglobal.org/xsd/imsvdex_v1p0"
      orderSignificant="false" language="en">
    <vocabIdentifier>your.package.car_models</vocabIdentifier>

    <term>
        <termIdentifier>very-special-bmw-model</termIdentifier>
        <caption>
            <langstring language="en">Very special BMW model</langstring>
            <langstring language="es">Un modelo de Be-eMe-uWe</langstring>
        </caption>
    </term>

    <relationship>
        <sourceTerm>very-special-bmw-model</sourceTerm>
        <targetTerm vocabIdentifier="your.package.car_manufacturers">bmw</targetTerm>
        <relationshipType source="http://www.imsglobal.org/vocabularies/iso2788_relations.xml">BT</relationshipType>
    </relationship>

...

</vdex>

Hierachical Tree

example of a tree vocabulary:

<vdex xmlns="http://www.imsglobal.org/xsd/imsvdex_v1p0" orderSignificant="true">
  <vocabIdentifier>beeeurope</vocabIdentifier>
  <vocabName>
    <langstring language="en">European Honey Bees</langstring>
  </vocabName>
  <term>
    <termIdentifier>nwe</termIdentifier>
    <caption>
      <langstring language="en">North-west of Europe</langstring>
    </caption>
    <term>
      <termIdentifier>nwe.1</termIdentifier>
      <caption>
        <langstring language="en">A. m. iberica</langstring>
      </caption>
    </term>
    <term>
      <termIdentifier>nwe.2</termIdentifier>
      <caption>
        <langstring language="en">A. m. intermissa</langstring>
      </caption>
    </term>
    <term>
      <termIdentifier>nwe.3</termIdentifier>
      <caption>
        <langstring language="en">A. m. lihzeni</langstring>
      </caption>
    </term>
    <term>
      <termIdentifier>nwe.4</termIdentifier>
      <caption>
        <langstring language="en">A. m. mellifera</langstring>
      </caption>
    </term>
    <term>
      <termIdentifier>nwe.5</termIdentifier>
      <caption>
        <langstring language="en">A. m. sahariensis</langstring>
      </caption>
    </term>
  </term>
  <term>
    <termIdentifier>swe</termIdentifier>
    <caption>
      <langstring language="en">South-west of Europe</langstring>
    </caption>
    <term>
      <termIdentifier>swe.1</termIdentifier>
      <caption>
        <langstring language="en">A. m. carnica</langstring>
      </caption>
    </term>
    <term>
   <term>
      <termIdentifier>swe.2</termIdentifier>
      <caption>
        <langstring language="en">A. m. cecropia</langstring>
      </caption>
    </term>
    <term>
      <termIdentifier>swe.3</termIdentifier>
      <caption>
        <langstring language="en">A. m. ligustica</langstring>
      </caption>
    </term>
    <term>
      <termIdentifier>swe.4</termIdentifier>
      <caption>
        <langstring language="en">A. m. macedonica</langstring>
      </caption>
    </term>
    <term>
      <termIdentifier>swe.5</termIdentifier>
      <caption>
        <langstring language="en">A. m. ruttneri</langstring>
      </caption>
    </term>
    <term>
      <termIdentifier>swe.6</termIdentifier>
      <caption>
        <langstring language="en">A. m. sicula</langstring>
      </caption>
    </term>
  </term>
</vdex>

0.2dev

• A bunch of refactoring in order to add a new vocab type: TreeVocabulary. As the name suggests, treevocabulary supports zope.schema.interfaces.ITreeVocabulary. It has better i18n-support using own i18n-domains for the caption and description of a term. [jensens]

0.1.2 (2014-01-07)

• don’t use context to determine current language, but use getSite. context may be adapter or other object without acquisition (eg. in forms with ignoreContext=True).

• depend on “setuptools”, not “distribute”

0.1.1 (2010-10-11)

• added History, How to access relations (from code) and Example VDEX file section to README. [garbas]

• moved code to http://github.com/collective/collective.vdexvocabulary. [garbas]

• BUG(Fixed): when vdex file was loaded it failed if there were not terms. [garbas]

0.1 (2010-06-23)

• add documentation and clean up code a little bit. [garbas]

0.1a1 (2010-04-29)

• initial release. [garbas]