Exporting XML

Functions for Exporting XML

Export

Exporting files.

With "XML" as the format, all expressions are exported as ExpressionML. In[1]:= Out[1]= In[2]:=

With "MathML" specified, the same expression is written out as MathML. In[3]:= Out[3]= In[4]:=

With only two arguments, Mathematica determines the export format based on the filename extension. .xml is associated with XML. Export[filename.xml, expr] is equivalent to Export[filename.xml, expr, "XML"]. In[5]:= Out[5]= In[6]:=

The .mml extension is associated with MathML. In[7]:= Out[7]= In[8]:=

Delete the test files created by evaluating the commands in this section. In[9]:=

ExportString

Exporting strings.

Produce a symbolic XML expression. In[11]:= Out[11]=

If a symbolic XML expression is supplied as the first argument of ExportString, the output is ordinary XML. In[12]:= Out[12]=

If the first argument is some other type of expression, the output is ExpressionML. In[13]:= Out[13]=

Export Options

Introduction

• "Annotations"

• "AttributeQuoting"

• "CheckXML"

• "ElementFormatting"

• "Entities"

• "NamespacePrefixes"

• "PrefixCreation"

"Annotations"

"XMLDeclaration"

When "XMLDeclaration" is one of the annotations, then an XML declaration, <?xml version="1.0"?>, is included in the header. In[35]:= Out[35]=

"DOCTYPEDeclaration"

When "DOCTYPEDeclaration" is one of the annotations, then an XML document type declaration of the form <!DOCTYPE ... > appears in the header. This specifies the DTD for the XML application in which the output is written. In[36]:= Out[36]=

"DocumentHeader"

With "Annotations"->{"DocumentHeader", "XMLDeclaration", "DOCTYPEDeclaration"}, the header automatically contains an XML declaration and a document type declaration for the DTD. In[37]:= Out[37]=

When "Annotations" does not contain "DocumentHeader", the output has no header. This is true even if "Annotations" contains other elements such as "XMLDeclaration" or "DOCTYPEDeclaration". In[38]:= Out[38]=

"Annotations"->"DocumentHeader" is useful for controlling the form of symbolic XML generated. Add an XMLElement[Document] to the symbolic XML output. In[39]:= Out[39]=

When "Annotations"->{"DocumentHeader"} is not specified, XMLElement[Document] is omitted from the output. In[40]:= Out[40]=

"AttributeQuoting"

Values for "AttributeQuoting".

The default setting, "AttributeQuoting"->"'", ensures that there is no conflict with Mathematica strings, which are typically enclosed in double quotes. In[1]:= Out[1]=

To enclose attribute values in double quotes, set "AttributeQuoting"->"\"". The double-quote character must be preceded by a forward slash to escape it. In[2]:= Out[2]=

"CheckXML"

Values for "CheckXML".

Checking the XML for errors can cause processing delays. In[14]:= In[15]:= Out[15]= In[16]:= Out[16]=

Here the symbolic XML expression has an error, but it is fixed to give a reasonable result. In[17]:= Out[17]= In[18]:=

With "CheckXML"->False, nothing is output to the file. In[19]:= Out[19]=

"ElementFormatting"

Values for "ElementFormatting".

An example using "ElementFormatting"->All. In[20]:= Out[20]= In[21]:= Out[21]=

With "ElementFormatting"->None, no extra indentation is added. In[22]:= Out[22]=

With "ElementFormatting"->Automatic, elements with mixed content (strings as content) are not indented, while elements with element-only content are indented. In[23]:= Out[23]=

With "ElementFormatting"->All, long strings are linewrapped. This can be used to produce output similar to HTML. On the other hand, ElementFormatting->Automatic produces one long line of text. In[24]:= Out[24]=

Advanced users can also specify a function to determine formatting. The function is passed a two-element list, {namespace, localName}. The function should return True when indenting is wanted, False when no indenting is wanted, and Automatic when the element-only content should be indented and mixed content should not be indented. In[25]:= In[28]:= Out[28]=

"Entities"

Values for "Entities".

Use the "HTML" setting to turn an into the named character entity α. In[29]:= Out[29]=

"Entities"->{
"&"->"&",
"<"->"&lt;",
">"->"&gt;",
"\""->"&quot;",
"'"->"&apos;",
"h"->"&lowerCaseH;"
}

The Icelandic character "thorn" is exported as the corresponding character entity reference. In[31]:= Out[31]=

Here, the entity is not declared and the literal output is retained. In[32]:= Out[32]=

"NamespacePrefixes"

Use "NamespacePrefix" to generate presentation markup with each MathML element having a namespace prefix "mml" associated with the MathML namespace. In[33]:= Out[33]= In[34]:=

"PrefixCreation"

Values for "PrefixCreation".

A sample of symbolic XML. In[1]:= Out[1]=

With "PrefixCreation"->"True", any namespace prefix generated has the form nsi , where i is an index that starts at 0 and is incremented by 1 whenever another namespace is needed. In[2]:= Out[2]=

With "PrefixCreation"->Automatic, a namespace declaration is automatically included only if the specified namespace has the form of a URL. In[3]:= Out[3]= In[4]:= Out[4]=

With "PrefixCreation"->False, the namespace is literally used as a namespace prefix. In[5]:= Out[5]=

RELATED TUTORIALS

• XML Capabilities

• Representing XML in Mathematica

• Importing XML

• Transforming XML

• Working with MathML