Omni Systems, Inc. Mif2Go User's Guide, Version 55
> 23 Including graphics in HTML > 23.8 Providing (or omitting) alternate text for images
Most current browsers display the content of
the alt
attribute of an <img>
tag only when the image itself is not displayed.
Note:
To show a text value in a tooltip when you move the pointer
over an image, use the title
attribute instead.
By default, if you do not
provide alt
text for an image, Mif2Go includes an empty alt
value, to satisfy validators. To omit empty alt
attribute values:
; AllowEmptyAlt = Yes (default) or No, omit empty alt attributes.
You can specify a value for the <img>
tag alt
attribute in any of the following ways:
Include the text in a paragraph
Add the text via Object Attributes
Assign the text to the graphic file.
Include the text in a paragraph
To use a dedicated paragraph format for alternate text, place a paragraph containing the text in your FrameMaker document, just before the image, and assign the following properties to the paragraph format:
The Delete
property
prevents the alternate text from appearing as part of the HTML output.
See §25.2.2 Assigning WAI image attributes with dedicated formats.
To use a character format instead of a paragraph
format to provide a value for the alt
attribute,
assign it in [HTMLCharStyles]
instead of in
[HTMLParaStyles]
.
To provide alternate text with a marker, insert a marker of type GraphAlt
in your FrameMaker document, just before the image. The content
of the GraphAlt marker becomes the value of the alt
attribute for the next image. See §25.2.3 Assigning WAI image attributes with custom markers
and §29.2.4 Using attribute markers for HTML or XML.
Add the text via Object Attributes
For images in anchored frames, in FrameMaker
7.0 and later versions you can provide a value for the alt
attribute via the Object Attributes dialog.
See §23.7 Specifying HTML image attributes
and §31.4.2 Overriding graphics settings with FrameMaker object attributes.
Assign the text to the graphic file
To assign alternate text to the graphic file (for example):
; Graphic file name (with or without extension) = desired alt text
ch01f853.gif = Schematic of tuner
This method is not recommended
if your document includes image maps, and you also use the [GraphALT]
section to assign alternate text to hotspot <area>
tags. You could lose the alt
content you assign
to the <img>
tags. See §23.10.2 Providing alternate text for a hotspot in an image map.