ha:lht_tree_doc { ha:roots {

	ha:pcb-rnd-board-v* {
		type=ha
		desc {
			The full, self-contained description of a printed circuit board.
			This is the root of a board .lht file. The * after the v in the name
			is an integer which is the format version.
		}
		li:children {
			ha:meta {
				type=ha
				desc { Any meta-data that won't directly turn into physical material (e.g. copper). }
				li:children {
					ha:board_name { valtype=string; desc={User assigned name of the board}}
					ha:grid {
						type=ha
						desc { User interface last grid settings }
						li:children {
							ha:offs_x { valtype=coord; desc={grid origin: X offset from 0;0}}
							ha:offs_y { valtype=coord; desc={grid origin: Y offset from 0;0}}
							ha:spacing { valtype=coord; desc={distance between two grid points both in X and Y directions }}
						}
					}
					ha:size {
						type=ha
						desc { object size related settings }
						li:children {
							ha:x { valtype=coord; desc={drawing area size X (width)}}
							ha:y { valtype=coord; desc={drawing area size Y (height)}}
							ha:isle_area_nm2 { valtype=double; desc={remove polygon islands smaller than this value, specified in nm<sup>2</sup>}}
							ha:thermal_scale { valtype=double; desc={scale all thermals on the board by this factor}}
						}
					}
					ha:drc {
						type=ha
						desc { design rule checker settings for the old DRC }
						ver {<5}
						li:children {
							ha:bloat { valtype=coord; desc={Minimum copper spacing}}
							ha:shrink { valtype=coord; desc={Minimum overlap between validly touching copper objects}}
							ha:min_width { valtype=coord; desc={Minimum copper width}}
							ha:min_silk { valtype=coord; desc={Minimum silk width}}
							ha:min_drill { valtype=coord; desc={Minimum drill diameter}}
							ha:min_ring { valtype=coord; desc={Minimum annular ring width}}
						}
					}
					ha:cursor {
						type=ha
						desc { obsolete cursor/view state }
						li:children {
							ha:x { valtype=coord; obs=1; desc={last position, X (horizontal)}}
							ha:y { valtype=coord; obs=1; desc={last position, Y (horizontal)}}
							ha:zoom { valtype=double; obs=1; desc={last view zoom factor}}
						}
					}
				}
			}
			ha:layer_stack {
				type=ha
				desc { physical layer stack information: geometry and properties of physical layers }
				li:children {
					ha:groups {
						type=li
						desc { ordered list of physical layers from top to bottom }
						li:children {
							ha:INTEGER {
								li:name_patterns={p={[0-9]+}}
								type=ha
								desc { a layer group (a physical layer of the board); the ID of the layer group is the integer in the name of the node }
								li:children {
									ha:name { valtype=string; desc={user assigned name of the layer group, e.g. "top copper"}}
									ha:type {
										type=ha
										desc { a flag-list of layer type flag bits }
										sy:children = {/lht_tree_doc/comm/layer_mask/children}
									}
									ha:name { valtype=string; ver={>=6} desc={purpose of layer groups (useful with mechanical/documentation groups}}
									ha:layers {
										type=li
										desc { ordered list of logical layer IDs hosted by this layer group }
									}
								}
							}
						}
					}
				}
			}
			ha:font {
				type=ha
				desc { font kit: all fonts used on the board (if no font specified, default font will be used) }
				li:children {
					sy:FONT-ID {/lht_tree_doc/roots/pcb-rnd-font-v1/children/FONT-ID}
				}
			}
			ha:styles {
				type=ha
				desc { routing styles hash: collection of all available routing syles }
				ha:ROUTE-STYLE-NAME {
					type=ha
					desc { routing style: a collection of pen settings }
					li:children {
						ha:thickness   { valtype=coord; desc={default trace thickness (affects lines and arcs)}}
						ha:text_thick  { valtype=coord; ver={>=6} desc={default text stroke thickness (0 means pick thickness automatically using the original algorithm)}}
						ha:text_scale  { valtype=coord; ver={>=6} desc={default text scaling (0 means 100%, for backward compatibility)}}
						ha:clearance   { valtype=coord; desc={default clearance (affects lines, arcs and polygons)}}
						ha:diameter    { valtype=coord; ver={<=5} desc={old round via outer diameter; removed in favor of padstack prototype based vias, see via_proto}}
						ha:hole        { valtype=coord; ver={<=5} desc={old round via hole diameter; removed in favor of padstack prototype based vias, see via_proto}}
						ha:via_proto   { valtype=integer; ver={>5} desc={padstack prototype ID used for placing new vias}}
						sy:attr@dup    {/lht_tree_doc/comm/attributes}
					}
				}
			}
			ha:netlists {
				type=ha
				desc { all available netlists }
				li:children {
					ha:netlist {
						type=li
						desc { the input netlist (as seen in the last netlist import, a.k.a. forward annotation) }
						li:children {
							ha:NETNAME {
								type=ha
								desc { a network }
								li:children {
									ha:conn {
										type=li
										desc { list of terminals connected to the network }
										li:children {
											ha:diameter    { valtype=string; desc={refdes-terminal}}
										}
									}
									sy:attr@dup   = {/lht_tree_doc/comm/attributes_v5p}
								}
							}
						}
					}
					ha:netlist_patch {
						type=li
						desc { a list of intentional deviations from the input netlist, a.k.a. material for back annotation }
						li:children {
							ha:net_info {
								type=li
								desc { describe the current state of a net, as seen on the input }
								li:children {
									ha:net   { valtype=string; desc={net name; first item on the list, only once}}
									ha:term  { valtype=string; desc={terminal name; zero or more items starting from the second item}}
								}
							}
							ha:add_conn {
								type=ha
								desc { the 'as built' network requires a new connection to be created during the back annotation }
								li:children {
									ha:net   { valtype=string; desc={net name the terminal should be added to}}
									ha:term  { valtype=string; desc={terminal name}}
								}
							}
							ha:del_conn {
								type=ha
								desc { the 'as built' network requires an existing connection to be removed during the back annotation }
								li:children {
									ha:net   { valtype=string; desc={net name the terminal should be removed from}}
									ha:term  { valtype=string; desc={terminal name}}
								}
							}
							ha:change_attrib {
								type=ha
								desc { the 'as built' network requires an attribute to be set or changed }
								li:children {
									ha:net   { valtype=string; desc={net name whose attribute needs to be changed }}
									ha:key   { valtype=string; desc={key (name) of the attribute}}
									ha:val   { valtype=string; desc={new value of the attribute}}
								}
							}
						}
					}
				}
			}
			sy:conf = {/lht_tree_doc/roots/pcb-rnd-conf-v1}
			sy:data = {/lht_tree_doc/comm/data}
			sy:attributes@dup = {/lht_tree_doc/comm/attributes}
		}
	}

}}
