Generate XML from a Template 

Use an XML template to create an XML source.

In[1]:=

X t = XMLTemplate["<ul> <wolfram:sequence values='#planets'> <li><wolfram:slot id='1'/></li> </wolfram:sequence> </ul>"]; TemplateApply[t, <|"planets" -> {"jupiter", "mars", "earth"}|>]

Out[1]=

Create template blocks and change what is inside with a function.

In[2]:=

X TemplateApply @ XMLTemplate[" <wolfram:template combiner='Composition[ToUpperCase, StringJoin]'> <p>this is a block of text and \ <wolfram:slot>slots</wolfram:slot></p> </wolfram:template> "]

Out[2]=

Transform and serialize data for JavaScript.

In[3]:=

X toJSON[expr_] := ExportString[expr, "Json"]; t = XMLTemplate[" <script type='text/javascript'> var planets = <wolfram:expr inserter=toJSON>Rule @@@ Transpose[ {#planets, #colors} ]</wolfram:expr>; </script> "]; TemplateApply[t, <|"planets" -> {"Mercury", "Earth", "Mars"}, "colors" -> {"Grey", "Light Blue", "Red"}|>]

Out[3]=