Need markup that can account for spatial materials

As a transcriber, sometimes I must present materials in a way that requires multiple parts of the same line to begin in specific cells and for the material to also begin in those cells on subsequent lines.

*Detail:*
Spatial content is a normal part of braille transcription. An example would be vertically arraigned math problems. These kinds of braille materials would require, for example, that each line of the first problem begin in the 3rd cell, each line of the second problem to begin in the 8th cell, and so on. Special markup will be required to ensure that this content can be presented dynamically, rather than requiring a fixed layout.

*Proposal:*
In order to avoid requiring that these kinds of spatial materials have a fixed layout, we need markup that allows for the different parts of the spatial material to be arraigned dynamically. This could require using a container that denotes the beginning and end of the spatial materials, while also using markup specific to each part of the spatial material, so that it can be laid out in a way that respects its spatial nature but while also allowing it to be rearraigned to fit varying line lengths.