This is a project to experiment with and track the work the OASIS XMILE Technical Committee is doing to standardize the XMILE file format.
The following simple Go program:
package main
import (
"encoding/xml"
"github.com/bpowers/go-xmile/xmile"
"log"
"os"
)
func xname(name string) xml.Name {
return xml.Name{"", name}
}
func main() {
m := &xmile.Model{
Variables: []*xmile.Variable{
&xmile.Variable{
XMLName: xname("aux"),
Name: "net_inflows",
Equation: "births + migrations",
Units: "people/yard",
},
&xmile.Variable{
XMLName: xname("flow"),
Name: "births",
Equation: "population*.08",
Units: "people/year",
},
&xmile.Variable{
XMLName: xname("flow"),
Name: "deaths",
Equation: "population*.07",
Units: "people/year",
},
&xmile.Variable{
XMLName: xname("flow"),
Name: "migrations",
Equation: "10",
Units: "people/year",
},
&xmile.Variable{
XMLName: xname("stock"),
Name: "population",
Equation: "100",
Inflows: []string{"births", "migrations"},
Outflows: []string{"deaths"},
Units: "people",
},
},
Views: []*xmile.View{},
}
f := xmile.NewFile(3, "hello xworld")
f.Models = append(f.Models, m)
f.SimSpec.TimeUnits = "year"
output, err := xml.MarshalIndent(f, "", " ")
if err != nil {
log.Fatalf("xml.MarshalIndent: %s", err)
}
os.Stdout.Write([]byte(xmile.XMLDeclaration + "\n"))
os.Stdout.Write(output)
os.Stdout.Write([]byte("\n"))
}Produces the output:
<?xml version="1.0" encoding="utf-8" ?>
<xmile version="1.0" level="3">
<header>
<name>hello, xworld</name>
<uuid>5ec6ca0d-74e5-a62c-e84a-527fb9753db1</uuid>
<vendor>SDLabs</vendor>
<product version="0.1" lang="en">go-xmile</product>
</header>
<sim_specs time_units="year">
<start>0</start>
<stop>0</stop>
<dt>0</dt>
</sim_specs>
<model>
<variables>
<aux name="net_inflows">
<eqn>births+migrations</eqn>
<units>people/yard</units>
</aux>
<flow name="births">
<eqn>population*.08</eqn>
<units>people/year</units>
</flow>
<flow name="deaths">
<eqn>population*.07</eqn>
<units>people/year</units>
</flow>
<flow name="migrations">
<eqn>10</eqn>
<units>people/year</units>
</flow>
<stock name="population">
<eqn>100</eqn>
<inflow>births</inflow>
<inflow>migrations</inflow>
<outflow>deaths</outflow>
<units>people</units>
</stock>
</variables>
</model>
</xmile>