The AddChild(xmlTree, child, n) command creates a new XML element from xmlTree by inserting the XML element child after the position indicated by n. Parameter n must be less than or equal to the number of children in the original tree xmlTree. The new child node child becomes the n + 1st child of the resulting tree.

$\mathrm{with}\left(\mathrm{XMLTools}\right)\:$

$x≔\mathrm{XMLElement}\left(''a''\,\left[\right]\,\left[''some\; text''\,\mathrm{XMLElement}\left(''b''\,\left[\right]\,''more\; text''\right)\,\mathrm{XMLElement}\left(''c''\right)\right]\right)$

$x≔\mathrm{\_XML\_Element}\left(\mathrm{\_XML\_ElementType}\left(''a''\right)\,\left[\right]\,\left[\mathrm{\_XML\_Text}\left(''some\; text''\right)\,\mathrm{\_XML\_Element}\left(\mathrm{\_XML\_ElementType}\left(''b''\right)\,\left[\right]\,\left[\mathrm{\_XML\_Text}\left(''more\; text''\right)\right]\right)\,\mathrm{\_XML\_Element}\left(\mathrm{\_XML\_ElementType}\left(''c''\right)\,\left[\right]\,\left[\right]\right)\right]\right)$

$\mathbf{use}\mathrm{XMLTools}\mathbf{in}\mathbf{for}i\mathbf{from}0\mathbf{to}\mathrm{ContentModelCount}\left(x\right)\mathbf{do}\mathrm{print}\left(\mathrm{AddChild}\left(x\,\mathrm{XMLElement}\left(''d''\,\left[\right]\,''some\; child\; text''\right)\,i\right)\right)\mathbf{end\; do}\mathbf{end\; use}$

$\mathrm{\_XML\_Element}\left(\mathrm{\_XML\_ElementType}\left(''a''\right)\,\left[\right]\,\left[\mathrm{\_XML\_Element}\left(\mathrm{\_XML\_ElementType}\left(''d''\right)\,\left[\right]\,\left[\mathrm{\_XML\_Text}\left(''some\; child\; text''\right)\right]\right)\,\mathrm{\_XML\_Text}\left(''some\; text''\right)\,\mathrm{\_XML\_Element}\left(\mathrm{\_XML\_ElementType}\left(''b''\right)\,\left[\right]\,\left[\mathrm{\_XML\_Text}\left(''more\; text''\right)\right]\right)\,\mathrm{\_XML\_Element}\left(\mathrm{\_XML\_ElementType}\left(''c''\right)\,\left[\right]\,\left[\right]\right)\right]\right)$

$\mathrm{\_XML\_Element}\left(\mathrm{\_XML\_ElementType}\left(''a''\right)\,\left[\right]\,\left[\mathrm{\_XML\_Text}\left(''some\; text''\right)\,\mathrm{\_XML\_Element}\left(\mathrm{\_XML\_ElementType}\left(''d''\right)\,\left[\right]\,\left[\mathrm{\_XML\_Text}\left(''some\; child\; text''\right)\right]\right)\,\mathrm{\_XML\_Element}\left(\mathrm{\_XML\_ElementType}\left(''b''\right)\,\left[\right]\,\left[\mathrm{\_XML\_Text}\left(''more\; text''\right)\right]\right)\,\mathrm{\_XML\_Element}\left(\mathrm{\_XML\_ElementType}\left(''c''\right)\,\left[\right]\,\left[\right]\right)\right]\right)$

$\mathrm{\_XML\_Element}\left(\mathrm{\_XML\_ElementType}\left(''a''\right)\,\left[\right]\,\left[\mathrm{\_XML\_Text}\left(''some\; text''\right)\,\mathrm{\_XML\_Element}\left(\mathrm{\_XML\_ElementType}\left(''b''\right)\,\left[\right]\,\left[\mathrm{\_XML\_Text}\left(''more\; text''\right)\right]\right)\,\mathrm{\_XML\_Element}\left(\mathrm{\_XML\_ElementType}\left(''d''\right)\,\left[\right]\,\left[\mathrm{\_XML\_Text}\left(''some\; child\; text''\right)\right]\right)\,\mathrm{\_XML\_Element}\left(\mathrm{\_XML\_ElementType}\left(''c''\right)\,\left[\right]\,\left[\right]\right)\right]\right)$

$\mathrm{\_XML\_Element}\left(\mathrm{\_XML\_ElementType}\left(''a''\right)\,\left[\right]\,\left[\mathrm{\_XML\_Text}\left(''some\; text''\right)\,\mathrm{\_XML\_Element}\left(\mathrm{\_XML\_ElementType}\left(''b''\right)\,\left[\right]\,\left[\mathrm{\_XML\_Text}\left(''more\; text''\right)\right]\right)\,\mathrm{\_XML\_Element}\left(\mathrm{\_XML\_ElementType}\left(''c''\right)\,\left[\right]\,\left[\right]\right)\,\mathrm{\_XML\_Element}\left(\mathrm{\_XML\_ElementType}\left(''d''\right)\,\left[\right]\,\left[\mathrm{\_XML\_Text}\left(''some\; child\; text''\right)\right]\right)\right]\right)$