http://sbgn.org/libsbgn/0.2
element port

Documentation

The port element describes an anchor point which arcs can refer to as a source or target. It consists in:

• absolute 2D cartesian coordinates (PointAttribute),
• a unique id attribute.

Two port elements are required for process nodes. They represent the extremity of the two "arms" which protrude on both sides of the core of the glyph (= square or circle shape). Other glyphs don't need ports (but can use them if desired).

Properties

This component is not nillable.

Model

<port
  id = xsd:ID
  x = xsd:float
  y = xsd:float>
(notes, extension )
</port>

id

The xsd:ID type is an alphanumeric identifier, starting with a letter. Port IDs often contain the ID of their glyph, followed by a local port number (e.g. glyph4.1, glyph4.2, etc.) However, this style convention is not mandatory, and IDs should never be interpreted as carrying any meaning.

Type:

xsd:ID

Use:

required

Form:

unqualified

x

Type:

xsd:float

Use:

required

Form:

unqualified

y

Type:

xsd:float

Use:

required

Form:

unqualified

Source

<xsd:element name="port">
  <xsd:complexType>
    <xsd:complexContent>
      <xsd:extension base="SBGNBase">
        <xsd:attributeGroup ref="sbgn:PointAttributes"/>
        <xsd:attribute name="id" type="xsd:ID" use="required">
        </xsd:attribute>
      </xsd:extension>
    </xsd:complexContent>
  </xsd:complexType>
</xsd:element>