<!-- The top level combination spec -->
<!-- OutputFilePrefix: Prefix to the output root file to be created (inspection histograms) -->
<!-- Mode: Type of the analysis -->
<!ELEMENT Combination (Input+,Measurement*)>
<!ATTLIST Combination
        OutputFilePrefix         CDATA            #REQUIRED
        Mode               CDATA            #REQUIRED
> 

<!-- Input files detailing the channels. One channel per file -->
<!ELEMENT Input (#PCDATA) >

<!-- Configuration for each measurement -->
<!-- Name: to be used as the heading in the table -->
<!-- Lumi: the luminosity of the measurement -->
<!-- LumiRelErr: the relative error known for the lumi -->
<!-- BinLow: the lowest bin number used for the measurement (inclusive) -->
<!-- BinHigh: the highest bin number used for the measurement (exclusive) -->
<!-- Mode: type of the measurement (a closed list of ...) -->
<!-- ExportOnly: if "True" skip fit, only export model -->
<!ELEMENT Measurement (POI,ParamSetting*,ConstraintTerm*) >
<!ATTLIST Measurement 
        Name              CDATA            #REQUIRED
        Lumi              CDATA            #REQUIRED
        LumiRelErr        CDATA            #REQUIRED
        BinLow            CDATA            #REQUIRED
        BinHigh           CDATA            #REQUIRED
        Mode              CDATA            #REQUIRED
        ExportOnly        CDATA            #IMPLIED
>

<!-- Specify what you are measuring. Corresponds to the name specified in the construction
of the model in the channel setup. Typically the NormFactor for xsec measurements -->
<!ELEMENT POI (#PCDATA) >

<!-- Specify what parameters are fixed, or have particular value -->
<!-- Val: set the value of the parameter -->
<!-- Const: set this parameter constant -->
<!ELEMENT ParamSetting (#PCDATA)>
<!ATTLIST ParamSetting 
        Val               CDATA           #IMPLIED
        Const             CDATA           #IMPLIED        
>

<!-- Specify an alternative shape to use for given constraint terms (Gaussian is used if this is not specified) -->
<!-- Type: can be Gamma or Uniform -->
<!-- RelativeUncertainty: relative uncertainty on the shape -->
<!ELEMENT ConstraintTerm (#PCDATA)>
<!ATTLIST ConstraintTerm 
        Type                  CDATA       #REQUIRED
        RelativeUncertainty   CDATA       #IMPLIED
>

<!-- Top element for channels. InputFile, HistoName and HistoPath
can be set at this level in which case they will become defaul to
all subsequent elements. Otherwise they can be set in individual 
subelements -->
<!ELEMENT Channel (Data*,Sample+)>
<!-- InputFile: input file where the input histogram can be found (use abs path) -->
<!-- HistoPath: the path (within the root file) where the histogram can be found -->
<!-- HistoName: the name of the histogram to be used for this (and following in not overridden) item -->
<!ATTLIST Channel
        Name              CDATA            #REQUIRED
        InputFile         CDATA            #IMPLIED
        HistoPath         CDATA            #IMPLIED
        HistoName         CDATA            #IMPLIED
>

<!-- Data to be fit. If you don't provide it, Asimov data will be created -->
<!-- InputFile: any item set here will override the configuration for the subelements. 
For this element there is no sublemenents so the setting will only have local effects -->
<!ELEMENT Data EMPTY>
<!ATTLIST Data
        InputFile         CDATA            #IMPLIED
        HistoPath         CDATA            #IMPLIED
        HistoName         CDATA            #IMPLIED
>


<!-- Sample elements are made up of systematic variations -->
<!ELEMENT Sample (HistoSys*,OverallSys*,NormFactor*)>
<!ATTLIST Sample
        Name              CDATA            #REQUIRED
        InputFile         CDATA            #IMPLIED
        HistoName         CDATA            #IMPLIED
        HistoPath         CDATA            #IMPLIED
        NormalizeByTheory      CDATA       #IMPLIED
> 

<!-- Systematics for which the variation is provided by histograms -->
<!ELEMENT HistoSys EMPTY>
<!ATTLIST HistoSys
        Name              CDATA            #REQUIRED
        InputFile         CDATA            #IMPLIED
        HistoFileHigh     CDATA            #IMPLIED
        HistoPathHigh     CDATA            #IMPLIED
        HistoNameHigh     CDATA            #IMPLIED
        HistoFileLow      CDATA            #IMPLIED
        HistoPathLow      CDATA            #IMPLIED
        HistoNameLow      CDATA            #IMPLIED
> 

<!-- Systematics for which the variation is provided by simple overall scaling -->
<!ELEMENT OverallSys EMPTY>
<!ATTLIST OverallSys
        Name              CDATA            #REQUIRED
        High              CDATA            #REQUIRED
        Low               CDATA            #REQUIRED
> 

<!-- Scaling factor, which may be the parameter of interest for cross section measurements-->
<!ELEMENT NormFactor EMPTY>
<!ATTLIST NormFactor
        Name              CDATA            #REQUIRED
        Val               CDATA            #REQUIRED
        High              CDATA            #REQUIRED
        Low               CDATA            #REQUIRED
        Const             CDATA            #REQUIRED
>