From http://www.w3schools.com (Copyright Refsnes Data)

XSL-FO external-graphic Object

Definition and Usage

The <fo:external-graphic> object is used for a graphic where the graphics data resides outside of the <fo:element> tree.

An <fo:external-graphic> may be placed block-level by enclosing it in an <fo:block>.

A "line-stacking-strategy" of "max-height" or "line-height" is typically used for stacking one or more lines with <fo:external-graphic> content.

<fo:external-graphic>
  <!--
	Contents:EMPTY
  -->
</fo:external-graphic>

Property [A-J]	Property [K-Z]
alignment-adjust	keep-with-next
alignment-baseline	keep-with-previous
azimuth	language
background-attachment	left
background-color	line-height
background-image	margin-bottom
background-repeat	margin-left
background-position-horizontal	margin-right
background-position-vertical	margin-top
baseline-shift	overflow
block-progression-dimension	padding-after
border-after-color	padding-before
border-after-style	padding-bottom
border-after-width	padding-end
border-before-color	padding-left
border-before-style	padding-right
border-before-width	padding-start
border-bottom-color	padding-top
border-bottom-style	pause-after
border-bottom-width	pause-before
border-end-color	pitch
border-end-style	pitch-range
border-end-width	play-during
border-left-color	relative-position
border-left-style	richness
border-left-width	right
border-right-color	role
border-right-style	scaling
border-right-width	scaling-method
border-start-color	script
border-start-style	source-document
border-start-width	space-end
border-top-color	space-start
border-top-style	speak
border-top-width	speak-header
bottom	speak-numeral
clip	speak-punctuation
content-height	speech-rate
content-type	src
content-width	stress
country	text-align
cue-after	text-indent
cue-before	top
display-align	voice-family
dominant-baseline	volume
elevation	width
height
id
inline-progression-dimension