Are there any documentation to the json props of ia.shapes.svg objects?

Here's the schema JSON (this should live somewhere in a Perspective jar as a resource file; I'm not giving you anything special here):

Schema
{
  "id": "ia.shapes.svg",
  "palette": {
    "category": "display",
    "name": "Drawing",
    "description": "A vector drawing, symbol, schematic, or diagram that uses SVG format"
  },
  "defaultMetaName": "Drawing",
  "showOnPalette": false,
  "schema": {
    "definitions": {
      "Element": {
        "type": "object",
        "properties": {
          "type": {
            "type": "string",
            "suggestions": [
              "circle",
              "clipPath",
              "defs",
              "ellipse",
              "group",
              "line",
              "linearGradient",
              "mask",
              "pattern",
              "path",
              "polygon",
              "polyline",
              "radialGradient",
              "rect",
              "text",
              "textPath",
              "tspan",
              "use"
            ]
          },
          "fill": {
            "type": ["string", "object"],
            "properties": {
              "opacity": {
                "type": ["string" , "number"]
              },
              "paint": {
                "type": ["string", "object"],
                "format": "color"
              },
              "rule": {
                "type": "string",
                "enum": [
                  "nonzero",
                  "evenodd",
                  "inherit"
                ]
              },
              "url": {
                "type": "string"
              }
            }
          },
          "stroke": {
            "type": ["string", "object"],
            "properties": {
              "dasharray": {
                "type": "string"
              },
              "dashoffset": {
                "type": "string"
              },
              "linecap": {
                "type": "string",
                "enum": [
                  "butt",
                  "round",
                  "square",
                  "inherit"
                ]
              },
              "linejoin": {
                "type": "string",
                "enum": [
                  "miter",
                  "round",
                  "bevel",
                  "inherit"
                ]
              },
              "miterlimit": {
                "type": "string"
              },
              "opacity": {
                "type": ["string" , "number"]
              },
              "paint": {
                "type": ["string", "object"],
                "format": "color"
              },
              "url": {
                "type": "string"
              },
              "width": {
                "type": ["string", "number"]
              }
            }
          },
          "clipPath": {
            "type": "string"
          },
          "clipRule": {
            "type": "string",
            "enum": [
              "nonzero",
              "evenodd",
              "inherit"
            ]
          },
          "id": {
            "description": "A DOM id that will be automatically prepended with prefix to prevent collisions with other DOM ids.",
            "type": "string"
          },
          "mask": {
            "type": "string"
          },
          "opacity": {
            "description": "How transparent an element and its children are.",
            "type": [ "number", "string"]
          },
          "overflow": {
            "description": "Sets what to do when an element's content is too big to fit in its block formatting context.  Browser support varies.",
            "type": "string",
            "enum": [
              "visible",
              "hidden",
              "scroll",
              "auto"
            ]
          },
          "pathLength": {
            "description": "Advanced SVG attribute representing the total length for the path, in user units.",
            "type": [ "number", "string"]
          },
          "transform": {
            "description": "A string of SVG transform definitions that are applied to an element and the element's children.",
            "type": "string"
          },
          "visibility": {
            "type": "string",
            "enum": [
              "visible",
              "hidden",
              "collapse"
            ]
          },
          "style": {
            "$ref": "urn:ignition-schema:schemas/style-properties.schema.json"
          },
          "elements": {
            "type": "array",
            "items": {
              "$ref": "#/definitions/Element"
            }
          }
        },
        "default": {
          "type": "group"
        },
        "required": [
          "type"
        ]
      }
    },
    "type": "object",
    "properties": {
      "viewBox": {
        "type": "string",
        "default": ""
      },
      "preserveAspectRatio": {
        "type": "string",
        "default": "xMidYMid",
        "enum": [
          "none",
          "xMinYMin",
          "xMidYMin",
          "xMaxYMin",
          "xMinYMid",
          "xMidYMid",
          "xMaxYMid",
          "xMinYMax",
          "xMidYMax",
          "xMaxYMax"
        ]
      },
      "elements": {
        "type": "array",
        "items": {
          "$ref": "#/definitions/Element"
        },
        "default": []
      },
      "style": {
        "$ref": "urn:ignition-schema:schemas/style-properties.schema.json"
      }
    }
  },
  "resources": [
    {
      "name": "perspective-components-css",
      "path": "/res/perspective/css/PerspectiveComponents.css",
      "type": "css"
    },
    {
      "name": "perspective-components-js",
      "path": "/res/perspective/js/PerspectiveComponents.js",
      "type": "js"
    }
  ]
}