Input:
<b>bold</b>
<span style="font-weight: 100">font weight 100</span>
<span style="font-weight: 200">font weight 200</span>
<span style="font-weight: 300">font weight 300</span>
<span style="font-weight: 400">font weight 400</span>
<span style="font-weight: 500">font weight 500</span>
<span style="font-weight: 600">font weight 600</span>
<span style="font-weight: 700">font weight 700</span>
<span style="font-weight: 800">font weight 800</span>
<span style="font-weight: 900">font weight 900</span>

Output:
NSParagraphStyle:
Alignment 4
    LineSpacing: 0
    ParagraphSpacing: 0
    ParagraphSpacingBefore: 0
    HeadIndent: 0
    TailIndent: 0
    FirstLineHeadIndent: 0
    LineHeight: 0/0
    LineHeightMultiple: 0
    LineBreakMode: 0
    Tabs: ()
    DefaultTabInterval: 36
    Blocks: (null)
    Lists: (null)
    BaseWritingDirection: 0
    HyphenationFactor: 0
    TighteningFactor: 0.05
    HeaderLevel: 0
[bold]
    NSFont: Times-Bold 16.00 pt.
[ font weight 100 font weight 200 font weight 300 font weight 400 font weight 500 ]
    NSFont: Times-Roman 16.00 pt.
[font weight 600]
    NSFont: Times-Bold 16.00 pt.
[ ]
    NSFont: Times-Roman 16.00 pt.
[font weight 700]
    NSFont: Times-Bold 16.00 pt.
[ ]
    NSFont: Times-Roman 16.00 pt.
[font weight 800]
    NSFont: Times-Bold 16.00 pt.
[ ]
    NSFont: Times-Roman 16.00 pt.
[font weight 900]
    NSFont: Times-Bold 16.00 pt.
[ ]
    NSFont: Times-Roman 16.00 pt.