| Valid value | Description |
|---|
| auto | For a glyph, the alignment-point is the intersection of the start-edge of the allocation-rectangle of the glyph-area and the block-progression-direction position of the alignment-point from the font as specified in . For other inline-areas, the alignment-point is at the intersection of the start-edge of the allocation-rectangle and the baseline identified by the "alignment-baseline" property if this baseline exists in the baseline-table for the dominant-baseline for the inline-area. If the baseline-identifier does not exist in the baseline-table for the glyph or other inline-area, then the User Agent may either use heuristics to determine where that missing baseline would be or may use the dominant-baseline as a fallback. For areas generated by an fo:external-graphic, or fo:instream-foreign-object, the alignment point is at the intersection of the start-edge and after-edge of the allocation-rectangle of the area. |
| baseline | The intersection of the start-edge of the allocation-rectangle and the dominant-baseline of the area. |
| before-edge | The intersection of the start-edge of the allocation-rectangle and the "before-edge" baseline of the area. |
| text-before-edge | The intersection of the start-edge of the allocation-rectangle and the "text-before-edge" baseline of the area. |
| middle | The intersection of the start-edge of the allocation-rectangle and the "middle" baseline of the area. |
| central | The intersection of the start-edge of the allocation-rectangle and the "central" baseline of the area. |
| after-edge | The intersection of the start-edge of the allocation-rectangle and the "after-edge" baseline of the area. |
| text-after-edge | The intersection of the start-edge of the allocation-rectangle and the "text-after-edge" baseline of the area. |
| ideographic | The intersection of the start-edge of the allocation-rectangle and the "ideographic" baseline of the area. |
| alphabetic | The intersection of the start-edge of the allocation-rectangle and the "alphabetic" baseline of the area. |
| hanging | The intersection of the start-edge of the allocation-rectangle and the "hanging" baseline of the area. |
| mathematical | The intersection of the start-edge of the allocation-rectangle and the "mathematical" baseline of the area. |