Package gavo :: Package dm :: Module vodml

Module vodml

Parsing VO-DML files and validating against the rules obtained in this way.

Validation is something we expect to do only fairly rarely, so none of this code is expected to be efficient.

Classes
	Model a vo-dml model.

Functions

openModelFile(prefix)
returns an open file for the VO-DML file corresponding to prefix.

source code

getModelForPrefix(*args)
returns a vodml.Model instance for as well-known VODML prefix.

source code

getAttributeDefinition(typeDef, attName)
returns the attribute definition for attName in typeDef as an etree.

source code

resolveVODMLId(vodmlId)
returns an etree element corresponding to the prefixed vodmlId.

source code

Variables
	KNOWN_MODELS = `{'NDcube': ('CubeDM-1.0.vo-dml.xml', 'http://ww...`
	__package__ = `'gavo.dm'`

Function Details

openModelFile(prefix)

source code

returns an open file for the VO-DML file corresponding to prefix.

This will raise a NotFoundError for an unknown prefix.

getModelForPrefix(*args)

source code

returns a vodml.Model instance for as well-known VODML prefix.

This caches models for prefixes and thus should usually be used from user code.

Note that this currently will currently return some stand-in shim for unknown prefixes. That behaviour will change to become a NotFoundError exception when there's actually useful data models.

Decorators:

@utils.memoized

getAttributeDefinition(typeDef, attName)

source code

returns the attribute definition for attName in typeDef as an etree.

This raises a NotFoundError if the attribute is not found.

resolveVODMLId(vodmlId)

source code

returns an etree element corresponding to the prefixed vodmlId.

Of course, this only works if vodmlId has a well-known prefix.

Variables Details

KNOWN_MODELS

Value:

{'NDcube': ('CubeDM-1.0.vo-dml.xml',
            'http://www.ivoa.net/dm/CubeDM-1.0.vo-dml.xml'),
 'dachstoy': ('dachstoy.vo-dml.xml', 'http://docs.g-vo.org/dachstoy'),
 'ds': ('DatasetMetadata-1.0.vo-dml.xml',
        'http://www.ivoa.net/dm/DatasetMetadata-1.0.vo-dml.xml'),
 'geojson': ('geojson.vo-dml.xml', 'http://docs.g-vo.org/geojson'),
 'ivoa': ('IVOA.vo-dml.xml', 'http://www.ivoa.net/dm/ivoa.vo-dml.xml')
,
...