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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Hi Seth,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New"'>> <tt><font face="Courier New">Ah, that certainly
clears it up. Once I know that order is important,</font></tt><br>
> <tt><font face="Courier New">it makes things more clear.<o:p></o:p></font></tt></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>After reading your question last night I
added a “Tag Data Structure” section to the language guide that explains
how things are structured and provides examples.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><tt><font size=2 face="Courier New"><span style='font-size:
10.0pt'>> So how do I handle optional values? I'm assuming that
optional values</span></font></tt><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'><br>
> <tt><font face="Courier New">_have_ to be attributes?</font></tt><br>
> <br>
> <tt><font face="Courier New">How does my program know the diff between:</font></tt><br>
> <br>
> <tt><font face="Courier New">java "com.example.classname"
"foo" "bar"</font></tt><br>
> <br>
> <tt><font face="Courier New">and</font></tt><br>
> <br>
> <tt><font face="Courier New">java "com.example.classname"
"bar"</font></tt><br>
> <br>
> <tt><font face="Courier New">where "bar" and "foo" are
semantically different?</font></tt></span></font><font color=navy><span
style='color:navy'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>You could have optional values or
attributes. Think of the values and attributes of a tag like a method
call on a method with a fixed set of parameters with types and optionally a
varags list (all the same type but with n elements) at the end. Right
now you have to check this programmatically, but in SDL 2.0 we will introduce
SDLS (SDL Schema) which will allow you to specify:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>For Tag Values:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> Typed parameters<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> A variable length argument
list at the end (like Object... in Java or params object[] in C#)<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>For Tag Attributes<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> Required attributes<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> Optional attributes<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>For Values and Attributes<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> Ranges for scalars<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> Regular expressions for
Strings<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> Possibly other types of
constraints<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Dan<o:p></o:p></span></font></p>
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