2 ways to navigate the tree

HIERARCHICAL NAVIGATION

html.body.img[0].getAttr(src)

html.body.table[0].tr[1].td[0].a[0].b[0].pcdata[0].txt

FLOW NAVIGATION

Using “->”, there are more than 1 way to get to a node
html->img[0].getAttr(src)

html.h1[0]->img[0].getAttr(src)
html->tr[1]->pcdata[0].txt
html->pcdata[7].txt

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