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mlreportgen.dom.HTML Class

Namespace: mlreportgen.dom
Superclasses: mlreportgen.dom.Container

Use HTML markup to create DOM document


Converts a string of HTML markup to DOM objects and appends them to an HTML object that it also creates. You can append the HTML object to a DOM document of any type, including Word and PDF documents.

The mlreportgen.dom.HTML class is a handle class.



htmlObj = HTML creates an empty HTML object.


htmlObj = HTML(htmlText) converts HTML text to an HTML object containing DOM objects having the same content and format.

An HTML object supports these HTML elements and attributes. In addition, HTML objects accept HTML that contains custom CSS properties, which begin with a hyphen. Custom CSS properties are supported in HTML, Microsoft® Word, and PDF output.

HTML ElementAttributes
aclass, style, href, name
addressclass, style
bclass, style
bigclass, style
blockquoteclass, style
bodyclass, style
centerclass, style
citeclass, style
codeclass, style
ddclass, style
delclass, style
dfnclass, style
divclass, style
dlclass, style
dtclass, style
emclass, style
fontclass, style, color, face, size
h1, h2, h3, h4, h5, h6class, style, align
hrclass, style, align
iclass, style
insclass, style
imgclass, style, src, height, width
kbdclass, style
liclass, style
markclass, style
nobrclass, style
olclass, style
pclass, style, align
preclass, style
sclass, style
sampclass, style
smallclass, style
spanclass, style
strikeclass, style
strongclass, style
subclass, style
supclass, style
tableclass, style, align, bgcolor, border, cellspacing, cellpadding, frame, rules, width
tbodyclass, style, align, valign
tfootclass, style, align, valign
theadclass, style, align, valign
tdclass, style, bgcolor, height, width, colspan, rowspan,align, valign, nowrap
thclass, style, bgcolor, height, width, colspan, rowspan,align, valign, nowrap
trclass, style, align,bgcolor, valign
ttclass, style
uclass, style
ulclass, style
varclass, style

For information about these elements, see

Input Arguments

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HTML text, specified as a character vector

Example: html = HTML('<p><b>Hello</b> <i style="color:green"> World</i></p>');


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For HTML markup to display correctly in your report, you must include end tags for empty elements and enclose attribute values in quotation marks. If you want to show a reserved XML markup character as text, you must use its equivalent named or numeric XML character.

Reserved CharacterDescriptionEquivalent Character
>Greater than&gt;
<Less than&lt;
"Double quotation mark&quot;
'Single quotation mark&apos;

HTML tag name of container, specified as a character vector. The name must be an HTML element, such as "div", "section", or "article".


Microsoft Word output ignores the HTML tag name.

Data Types: char | string

Whether to convert white space between elements, specified as true or false. If KeepInterElementWhiteSpace is true, the DOM API converts white space between elements in the input HTML markup to mlreportgen.dom.Text objects. If false, the DOM API ignores white space between elements.

Setting the KeepInterElementWhiteSpace property to true does not preserve white space. To preserve white space, set the KeepInterElementWhiteSpace property to true and add an mlreportgen.dom.WhiteSpace format object to the Style property of the HTML object. The WhiteSpace property of the WhiteSpace object must be set to 'preserve'. For example:

import mlreportgen.dom.*
d2 = mlreportgen.dom.Document("ex2","pdf");
h2 = HTML();
h2.Style = {WhiteSpace('preserve')};
h2.KeepInterElementWhiteSpace = true;
append(h2,'<p>    <span>Hello</span>    <span>World!</span></p>');

If the input HTML preserves white space using a style attribute, you do not need to use the KeepInterElementWhiteSpace property and WhiteSpace object. For example:

import mlreportgen.dom.*
d1 = mlreportgen.dom.Document("ex1","pdf");
h1 = HTML();
append(h1,'<p style="white-space:pre"> <span>Hello</span>    <span>World!</span></p>');

If the input HTML uses a CSS style to preserve white space, the DOM API does not preserve the white space unless you use the KeepInterElementWhiteSpace and the WhiteSpace object. For example:

import mlreportgen.dom.*
d3 = mlreportgen.dom.Document("ex3","pdf");
h3 = HTML();
h3.Style = {WhiteSpace('preserve')};
h3.KeepInterElementWhiteSpace = true;
append(h3,[ ...
    '<style type="text/css">.myStyle { white-space: pre}</style>' ...
    '<p class="myStyle"> <span>Hello</span>    <span>World!</span></p>']);

Alternatively, if the input HTML uses a CSS style to preserve white space, you can prepare the HTML using mlreportgen.utils.html2dom.prepHTMLString or mlreportgen.utils.html2dom.prepHTMLFile. Then, create an HTML object from the prepared HTML. For example:

import mlreportgen.dom.*
d3 = mlreportgen.dom.Document("ex3","pdf");
h3 = HTML();
htmlStr = ['<style type="text/css">.myStyle { white-space: pre}</style>' ...
    '<p class="myStyle"> <span>Hello</span>    <span>World!</span></p>'];
preppedhtml = mlreportgen.utils.html2dom.prepHTMLString(htmlStr);

See Prepare HTML Before Conversion.

Font size of one em unit, in points, specified as an integer. If a style in the HTML text specifies font size in em units, the number of em units is multiplied by the value of the EMBaseFontSize property to determine the font size in points. For example, the following code results in a font size of 20 points.

h = HTML();
     h.EMBaseFontSize = 10;
     append(h, '<p style="font-size:2em">Hello</p>');

Set the EMBaseFontSize property in an empty mlreportgen.dom.HTML object. Then add the HTML to the object. For example:

import mlreportgen.dom.*; 
rpt = Document('MyReport','pdf');  
htmlobj = HTML();
htmlobj.EMBaseFontSize = 14;
append(htmlobj,'<p style="font-size:2em">Hello</p>');

Setting the EMBaseFontSize property in an mlreportgen.dom.HTML object that already contains the HTML has no effect.

Style name, specified as a character vector or a string scalar. The style name is the name of a style specified in the style sheet of the document or document part to which this element is appended. The specified style defines the appearance of this element in the output document unless overridden by the formats specified by the Style property of this element. To learn more about using style sheets, see Use Style Sheet Styles.


Microsoft Word output ignores the style name.



Data Types: char | string

Formatting to apply to this document element object, specified as a cell array of DOM format objects. The formats specified by this property override corresponding formats specified by the StyleName property of this element. Formats that do not apply to this element are ignored.


The children of this document element object inherit any of these formats that they do not override.



Data Types: cell

Parent of mlreportgen.dom.HTML object, specified as a document element object. A document element must have only one parent.



Children elements of this HTMLFile object, specified as an array of mlreportgen.dom.Element objects.



Tag for mlreportgen.dom.HTML object, specified as a character vector or string scalar. The DOM API generates a session-unique tag as part of the creation of this object. The generated tag has the form CLASS:ID, where CLASS is the object class and ID is the value of the Id property of the object. Specify your own tag value to help you identify where to look when an issue occurs during document generation.



Data Types: char | string

A session-unique identifier is generated as part of HTML object creation. You can specify your own value for Id.



Data Types: char | string


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Create an mlreportgen.dom.HTML object from HTML markup and add it to a Word report.

import mlreportgen.dom.*;
rpt = Document('MyReport', 'docx');
html = HTML('<p><b>Hello</b> <i style="color:green"> World</i></p>');
append(html, '<p>This is <u>me</u> speaking</p>');
append(rpt, html);
The resulting Word report looks like this:


  • MATLAB® Report Generator™ mlreportgen.dom.HTML or mlreportgen.dom.HTMLFile objects typically cannot accept the raw HTML output of third-party applications, such as Microsoft Word, that export native documents as HTML markup. In these cases, your Report API report generation program can use the mlreportgen.utils.html2dom.prepHTMLString and mlreportgen.utils.html2dom.prepHTMLFile functions to prepare the raw HTML for use with the mlreportgen.dom.HTML or mlreportgen.dom.HTMLFile objects. Typically, your program will have to further process the prepared HTML to remove valid but undesirable objects, such as line feeds that were in the raw content.

  • Word and PDF documents require inline elements, such as text and links, to be contained in a paragraph. To meet this requirement, the HTML parser creates wrapper paragraphs to contain inline elements that are not already in a paragraph. If you create an mlreportgen.dom.HTML or mlreportgen.dom.HTMLFile object from HTML that contains inline elements that are not in paragraphs and add the object to an HTML document, the generated HTML can differ from the input HTML. To generate the inline elements without the added wrapper paragraphs, insert the HTML markup into an HTML document by using an mlreportgen.dom.RawText object.

  • By default, the DOM API uses a base font size of 12 points to convert em units to actual font sizes. For example, a font size specified as 2em converts to 24 points. To specify a different base font size, add your content to a report by using an mlreportgen.dom.HTML object. Set the EMBaseFontSize property of the object to the base font size. For example, if you set the EMBaseFontSize property to 14, a font size of 2em converts to 28 points.

Version History

Introduced in R2015a