CSS Properties
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Standard W3C CSS Properties
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Table 1. The following standard properties are supported by Oxygen PDF Chemistry
Property Supported Values Unsupported Values Notes
background
background-color
background-image
background-position
background-repeat
background-size
bookmark-label
bookmark-level
bookmark-state
border
border-bottom
border-bottom-color
border-bottom-style
border-bottom-width
border-collapse separate | collapse
border-color
border-left
border-left-color
border-left-style
border-left-width
border-right
border-right-color
border-right-style
border-right-width
border-spacing <length>
border-style
border-top
border-top-color
border-top-style
border-top-width
border-width
bottom-property
caption-side top|bottom left|right
color
column-span
content
counter-increment
counter-reset
direction
display inline|block|inline-block|table|table-row|table-cell|table-caption|table-row-group|table-header-group|table-footer-group|table-column |-oxy-morph

For the display:none, the elements are not eliminated from the DOM, are just collapsed. The text may remain in the document, but is not visible. This is needed for keeping the links working.

For -oxy-morph, read more here.
empty-cells
float
font
font-family
font-size
font-src
font-style
font-variant small-caps|normal Cannot be combined with the :first-letter pseudo element or overflow-wrap: break-word CSS property.
font-weight
height
image-resolution <dpi>
left-property
letter-spacing
line-height
list-style
list-style-image none|url()
list-style-position
list-style-type
margin
margin-bottom <length>
margin-left auto|<length>
margin-right auto|<length>
margin-top <length>
max-height <length>
max-width <length>
min-height <length>
min-width <length>
orphans <number>
outline
outline-color
outline-style
outline-width
overflow-wrap break-word It works by adding soft hyphens (invisible hyphens) in words with 8 or more characters, so it might behave slightly different from the specification. The soft hyphen specifies a place in the text where a hyphenated break is allowed. It becomes visible only after word wrapping at the end of a line.
padding
padding-bottom
padding-left
padding-right
padding-top
page
page-break-after
page-break-before
page-break-inside
position fixed|absolute relative The absolute positioning is done relative to the direct parent. This is a limitation - CSS specifies that you can mark a parent block with position:relative, and absolute children will be placed relative to this.
right-property
size
string-set content()|counter()
table-column-span
table-layout fixed|auto
table-row-span
text-align start|end|left|right|center|justify|justify-all
text-decoration
text-decoration-color
text-decoration-line
text-decoration-style
text-indent
text-transform
top-property
transform
transform-rotation
unicode-bidi
vertical-align baseline | sub | super | text-top | text-bottom | middle | top | bottom <length>|<percentage>
visibility
white-space normal | nowrap | pre | pre-wrap
widows <number>
width

Extension CSS Properties
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Table 2. The following extension properties are supported by Oxygen PDF Chemistry
Property Description Supported Values
-oxy-alt-text Used to specify an alternative description for the element that is used by the PDF readers. 
image {
  -oxy-alt-text: "Image about: " attr(href);
}
 string
-oxy-hyphenation-character Used to specify the Unicode character to be presented when a hyphenation break occurs. To hide hyphens, use the space character.
pre {
  -oxy-hyphenation-character: " ";
}
 <character>|inherit
-oxy-hyphenation-push-character-count Used to specify the minimum number of characters in a hyphenated word after the hyphenation character (the minimum number of characters in the word pushed to the next line).
p {
  -oxy-hyphenation-push-character-count: "2";
}
 <number>|inherit
-oxy-hyphenation-remain-character-count Used to specify the minimum number of characters in a hyphenated word before the hyphenation character (the minimum number of characters in the word left on the line ending with the hyphenation character).
p {
  -oxy-hyphenation-remain-character-count: "2";
}
 <number>|inherit
-oxy-initial-page-number Used to set the initial page number to be used on this particular page sequence.
@page chapter-page {
	-oxy-initial-page-number: auto-odd;
}
 auto|auto-odd|auto-even|<number>|inherit
-oxy-force-page-count Used to impose a constraint on the number of pages in a page sequence. If this constraint is not satisfied, an additional page will be added to the end of the sequence. This page becomes the "last" page of that sequence.
@page chapter-page {
	-oxy-initial-page-number: auto-odd;
}
 auto|evenodd|end-on-even|end-on-odd|no-force|inherit
-oxy-link Used to create links in the PDF output.
link {
  -oxy-link: attr(href);
}
 none|url()
-oxy-page-group Using the start value forces the creation of a new page group (sequence) even if the page before the element has the same name. The auto value uses the W3C algorithm normally, which would merge the current element with the opened page sequence.
chapter {
      -oxy-page-group:start;
      page: chapter;
}
 start|auto
-oxy-pdf-meta-author Used to forward meta-information to the PDF. Represents the author of the publication.
meta[name='author'] {
  -oxy-pdf-meta-author: attr(value);
}
 string
-oxy-pdf-meta-custom Used to forward meta-information to the PDF. Represents a generic custom document property. Should have two strings, the name and the value.
metadata {
  -oxy-pdf-meta-custom: attr(name) attr(value);
}
 string
-oxy-pdf-meta-description Used to forward meta-information to the PDF. Represents the description of the publication. 
meta[name='description'] {
  -oxy-pdf-meta-description: attr(value);
}
 string
-oxy-pdf-meta-keyword Used to forward meta-information to the PDF. Represents a single keyword from the publication. The processor should aggregate all keyword definitions and separate them by comma.
keyword {
  -oxy-pdf-meta-keyword: content(text);
}
 string
-oxy-pdf-meta-keywords Used to forward meta-information to the PDF. Represents the keywords of the publication. The value should contain the keywords separated by commas.
meta[name='keywords'] {
  -oxy-pdf-meta-keywords: attr(value);
}
 string
-oxy-pdf-meta-title Used to forward meta-information to the PDF. Represents the title of the publication. 
meta[name='title'] {
  -oxy-pdf-meta-title: attr(value);
}
 string
-oxy-pdf-tag-type Maps an element to a PDF accessibility tag. 
section {
  -oxy-pdf-tag-type: "Sect";
}
 string
-oxy-style An Oxygen extension used to define additional styles for an element (for example, collected from an attribute). 
div {
     font-weight:bold;
     color:red;
     -oxy-style:attr(style);
}
The value of the style attribute from the div element is parsed as a collection of CSS properties and applied over the current element styles. For instance, if the style attribute has the value color:green; border: 1pt solid red, it will combine with the existing properties, resulting in:
font-weight:bold; 
color:green;
border: 1pt solid red
CSS fragment
-oxy-simulate-style

Set this flag to yes when the styles (bold, italic, or both) need to be simulated from a regular font. See: Using Simulated (Synthetic) Styles.

 yes|no