gem 'xsd'

require 'xsd'

# Load ruby-xsd
reader = XSD::XML.open('some.xsd')

# Get element by name with hash lookup 
element = reader['NewReleaseMessage']

# Get element by namespace + name with hash lookup
element = reader['{http:https://ddex.net/xml/ern/36}NewReleaseMessage']

# Get element child elements
element.collect_elements.map(&:name) # => ['MessageHeader', 'UpdateIndicator', 'IsBackfill', 'CatalogTransfer', 'WorkList', 'CueSheetList', 'ResourceList', 'CollectionList', 'ReleaseList', 'DealList']

# Get attributes
attribute = reader['NewReleaseMessage']['@MessageSchemaVersionId']

# Get attribute information
attribute.name # => 'MessageSchemaVersionId'
attribute.type # => 'xs:string'
attribute.data_type # => 'string'
attribute.required? # => true
attribute.optional? # => false
attribute.prohibited? # => true

# Get element information
element = reader['NewReleaseMessage']['ResourceList']['SoundRecording'] # => XSD::Element
element.min_occurs # => 0
element.max_occurs # => :unbounded
element.type # => 'ern:SoundRecording'
element.complex_type # => XSD::ComplexType
element.complex_content? # => true
element.simple_content? # => false
element.mixed_content? # => false
element.multiple_allowed? # => true
element.required? # => false