[NeXus-definitions-tickets] [NeXusDefinitions] #129: "link" defined incorrectly in nxdl.xsd

[NeXus Base Classes and Instrument Definitions]

#129: "link" defined incorrectly in nxdl.xsd
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Reporter:  Pete Jemian  |       Owner:  Pete Jemian     
    Type:  defect       |      Status:  new             
Priority:  major        |   Milestone:  release NXDL 1.0
Keywords:               |  
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 Presently, the NXDL schema defines a ''link'' (in {{{<xs:group
 name="groupGroup">}}}) as a child element of a {{{<group/>}}}.  This means
 an NXDL specification could have a{{{ <link/>}}} element at the same level
 as a {{{<field/>}}} element.  That's not how we use links in NeXus.
 Instead, links are used within the ''target'' attribute of a
 {{{<field/>}}}, such as
 {{{
   <polar_angle target="/NXentry/NXinstrument/NXdetector/polar_angle">
 }}}

 My proposition is to change '''nxdl.xsd''':
  1. remove the existing definition of ''link'' from {{{<xs:group
 name="groupGroup">}}}
  1. remove the definition of {{{<xs:complexType name="linkType">}}}
  1. add an optional attribute {{{target}}} to {{{<xs:complexType
 name="fieldType">}}} defined similarly to the existing {{{linkType}}}
 definition.

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Ticket URL: <http://trac.nexusformat.org/definitions/ticket/129>
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