Two Simple XPATH questions

<tag1>

<tag2></tag2>

</tag1>

If I'm in tag2, how do I access tag1? I tried ../tag1[1] and parent[1]

And also, how would I access the first element from an att with XPATH? For example, this didn't work:

<e-i-c gi="code" occur="all">
...
<att>

<specval attname="code[1]" attloc="#xpath" attval="1"/">
<charsubset>...</charsubset>
</att>
</e-i-c>