# Schema to model pipelines in the Bloomsbury XML CMS.
#
# A pipeline consists of at least one step, to be executed
# by the processor sequentially, in document order.
#
# In the case of a transform step, the output of one step
# is passed to the following step.
#
# Note that attribute failOnError is NOT specified for the 
# transform step, since a failed transformation will result
# in non-well-formed output (if at all) that cannot be 
# passed on to the next step.
#
# The input into a pipeline is expected to be a single
# document. The output of the final (non-validation) step
# is one or more documents.
#
# The output location is implementation-defined.
#
# Author: Andrew Sales <andrew.sales@bloomsbury.com>
# Date: 20170629
# Version: 0.1
# Comments: 


default namespace = "http://cms.bloomsbury.com/pipeline"

start =
  element pipeline {
    attribute id { xsd:ID },
    attribute name { xsd:NCName },
    step+
  }

step = transform | validate

label = attribute label{text}

transform = element transform {
      attribute href { xsd:anyURI },
      label?
    }

validate = element validate {
      attribute failOnError { xsd:boolean }?,   #whether to abort if validation errors occur
      attribute href { xsd:anyURI },
      label?
    }