CycleNet 0,1a (C) Crown Copyright 2008 


Notes on the 01c draft of CNM

1. Starting point was the ITN MasterMap schemas as published on the Ordnance survey Site  

2. Unfortunately the ITN current release  still references the original v1. gml definitions, which do not comply with strict XML and will not validate.   I  therefore updated them to  use GML 1.1.1 which fixed most problems

   * I added a small extra file geometryPatch with two workarounds. 
   * In line with gml & other standards I moved the xml sub package files into appropriately named subdirectories
  eg base, osmm, xlink to facilitate management
   * I marked all the OS ITN files I had modified by adding a version number 

3. The ITN schemas cover only the ITN road network. There is no ITN PN schema covering paths 

   * To address this I added an additional file OSDNFeatures-PN-RI-v1.1.xsd and reverse engineered
      a PN schema from some sample ITN2 data, together with the PN design in the CNM document 
      See 
           osmm / OSDNFFeatures-PN-RI-v1.1.xsd  in the zip
   * I kept closely to the style of ITN       
   *  This required some minor mods to the Enumerated values in the base OS SimpleTypes
       To check the baseline PN schema I successfully validated my revised schema against an extract of sample data from ITN2.
    
4. I Then created the Cnm  schema as five packages
   * The main root file is 
            /cnm / cnmFeatures-ITNPN-v0.1.xsd
   * Corresponding road elements can be found at 
               /cnm / cnmFeatures-ITNPN-v0.1.xsd
   * I added a rough draft of convenience top level schema  - suggest use this as entry point as it lists all the main model elements explicitly  see    
           CycleNet.xsd
   * I used the name CycleNet and the namespace www.cyclenet.org.uk/cnm
   * I have commented all the CNM elements, but not the OS or gml ones w 
       
   * The package manifest is 
   
   CycleNet.xsd
       apd    ; govtalk types
         CommonSimpleTypes-v1-3.xsd
       base   ; Gml files
          gml.xsd
          gmlBase.xsd
          basicTypes.xsd
             ... etc etc
       cnm    ; Cnm
          cnmFeatures-ITNPN-v0.1.xsd
          cnmFeatures-ITNRN-v0.1.xsd
          cnmRoutingQualifiers-v0.1.xsd
          cnmBasicTypes-v0.1.xsd
          cnmCommunityRights-v0.1.xsd
        dnf  ; dnf types
       osmm ; ordnance ITN packages
          OSDNFFeatures-PN-RI-v1.1.xsd
          OSDNFFeatures-v1.1.xsd
          OSGeometryTopology-v1.1.xsd
          OSImageMetadata-v1.1.xsd
          OSIMProductMetadata-v1.1.xsd
          OSIMSupplierMetadata-v1.1.xsd
          OSMeasures.xsd
          OSOrthoMetadata.xsd
          OSQueryResult-v1.1.xsd
          OSSimpleTypes-v1.1.xsd
          geometryPatch.xsd
          OS_all-v1.1.xsd
          OSAerialMetadata.xsd
          OSComplexTypes-v1.1.xsd
       smil  ; gml ancillary
       xlink  ; xml utility
       xml   ; xml utility