in the batched graph example, https://docs.dgl.ai/tutorials/basics/4_batch.html, how do you account for the various ways graph nodes could be ordered? For example Node0 corresponds to different points across the various graph classes. Lets say I had three nodes A,B,C depending on the order I add them using “add_edge” the assignment by DGL of consecutive integers will change? How does DGL various differences in graph node ordering?

# Graph Node Ordering

**minjie**#2

The order of the nodes and edges is determined during graph construction. In your example, `G.add_nodes(3)`

will be called first to add three nodes. However, at this moment, which id, for example, does node A correspond to is unknown. Let’s say there is an edge A->B, which is added by `G.add_edge(1, 2)`

. This means that you want A to be node 1 and B be node 2, so node A’s feature will be the second row in the tensor returned by `G.ndata`

.

`dgl.batch`

will keep the node edge order of each given graphs. For example, node 2 in graph 0 will be node 2, while node 2 in graph 1 will be node `|graph0_size| + 2`

.

**mufeili**#3

It seems that the link has triggered the automatic spam detection by the system and I accidentally approved the spam flagging request. I haven’t figure out how to undo that and I’m sorry for it.