Something may be "from inward to outward" or "from outward to inward". I want examples of English words (for general mathematical or philosophical terms, not for special things like cooking eggs) describing such things.
For example if instead of "from inward to outward" or "from outward to inward" it were "from left to right" and "from right to left", the appropriate English word would be "direction".
My particular task is to find an English word for processing XML either from inward to outward or from outward to inward, in order to name a thing in a new XML-related standard. But you don't need to know what is XML to answer my question.
The more appropriate words you give, the better, as this allows me more choice to name this thing.