[LandXML] Re: brkType required attribute
- From: "Nathan Crews" <nathan.crews@xxxxxxxxxxxx>
- To: "Matthew Osborn" <matthew.osborn@xxxxxxxxxxxx>, "Widhalm, Eric - Fort Collins, CO" <Eric.Widhalm@xxxxxxxxxxxx>, <gpetrik@xxxxxxxxxxxxx>, <landxml@xxxxxxxxxxxxx>
- Date: Wed, 2 Nov 2005 17:28:03 -0500
Ok, we can add "standard" to the enumeration:
<xs:simpleType name="breakLineType">
<xs:restriction base="xs:string">
<xs:enumeration value="standard"/>
<xs:enumeration value="wall"/>
<xs:enumeration value="proximity"/>
<xs:enumeration value="nondestructive"/>
</xs:restriction>
</xs:simpleType>
Nathan
-----Original Message-----
From: Matthew Osborn
Sent: Wed 11/2/2005 12:02 PM
To: Nathan Crews; Widhalm, Eric - Fort Collins, CO;
gpetrik@xxxxxxxxxxxxx; landxml@xxxxxxxxxxxxx
Cc:
Subject: RE: [LandXML] Re: brkType required attribute
I found some LandXML data from Bentley InRoads that uses
<Breakline brkType="standard">
Matt
P.S. I agree that the 1.0 schema should be left as-is.
_____
From: landxml-bounce@xxxxxxxxxxxxx
[mailto:landxml-bounce@xxxxxxxxxxxxx] On Behalf Of Nathan Crews
Sent: Wednesday, November 02, 2005 1:43 PM
To: Widhalm, Eric - Fort Collins, CO; gpetrik@xxxxxxxxxxxxx;
landxml@xxxxxxxxxxxxx
Subject: [LandXML] Re: brkType required attribute
The problem is that the 1.0 specification is broken, making the
<Breakline brkType="???"> ambiguous, but required for validation. I am never in
favor of changing a published spec, but this is a clear defect that could be
fixed without negative side effects.
This depends on if software vendors are using this data element. I
searched all submitted sample LandXML files for registered software and found
no instances of <Breakline> elements.
If the concensous is that this would be a detriment to existing
software and data files, then I would agree to change the 1.1 spec and leave
1.0 as-is.
Any other software vendors out there with an opinion on this?
Regards,
Nathan
-----Original Message-----
From: Widhalm, Eric - Fort Collins, CO
[mailto:Eric.Widhalm@xxxxxxxxxxxx]
Sent: Wed 11/2/2005 11:29 AM
To: Nathan Crews; gpetrik@xxxxxxxxxxxxx; landxml@xxxxxxxxxxxxx
Cc:
Subject: RE: [LandXML] Re: brkType required attribute
Could I suggest that the change go to 1.1 and 1.0.1? Lotsa
code has been written based on the 1.0 API, and would have to be
revisited/addressed just to get the old datasets to validate if you change 1.0
...
-Eric
_____
From: landxml-bounce@xxxxxxxxxxxxx
[mailto:landxml-bounce@xxxxxxxxxxxxx] On Behalf Of Nathan Crews
Sent: Wednesday, November 02, 2005 11:09 AM
To: gpetrik@xxxxxxxxxxxxx; landxml@xxxxxxxxxxxxx
Subject: [LandXML] Re: brkType required attribute
This is clearly an oversight in the LandXML specification. The
intention was to provide an enumerated list of breaklines types, which indicate
how it should be applied to surface modeling.
I think we should fix this asap in both LandXML 1.0 and 1.1
schema specifications.
We can add a new enumeration for "Wall, Proximity and
nondestructive" and any others that would be useful. We could also add
"curved". Please let me know if additional types are required.
Proposal:
Add the following enumeration:
<xs:simpleType name="breakLineType">
<xs:restriction base="xs:string">
<xs:enumeration value="wall"/>
<xs:enumeration value="proximity"/>
<xs:enumeration value="nondestructive"/>
</xs:restriction>
</xs:simpleType>
Then use it in:
<xs:element name="Breakline">
<xs:annotation>
<xs:documentation>The breakline is defined by a 2D
north/east or 3D north/east/elev list of points that define the
geometry.</xs:documentation>
<xs:documentation>is identified by the "name"
attribute.</xs:documentation>
</xs:annotation>
<xs:complexType>
<xs:sequence>
<xs:choice>
<xs:element ref="PntList2D"/>
<xs:element ref="PntList3D"/>
<!-- Here PntList2D represents 2D planametric coordinate
pairs expressed as space delimited Northing Easting pairs. -->
</xs:choice>
<xs:element ref="Feature" minOccurs="0"
maxOccurs="unbounded"/>
</xs:sequence>
<xs:attribute name="brkType" type="brkLineType"
use="required"/>
<xs:attribute name="desc" type="xs:string"/>
<xs:attribute name="name" type="xs:string"/>
<xs:attribute name="state" type="stateType"/>
</xs:complexType>
</xs:element>
Regards,
Nathan Crews
www.landxml.org
-----Original Message-----
From: landxml-bounce@xxxxxxxxxxxxx on behalf of Gergely
Petrik
Sent: Wed 11/2/2005 9:01 AM
To: landxml@xxxxxxxxxxxxx
Cc:
Subject: [LandXML] Re: brkType required attribute
It must be OK if I write out these attributes as
strings (just as you typed them below), right? The schema says nothing about
that, that's why I asked it here. Thanks, you helped a lot.
--
G
> I can think of at least three types. Wall, Proximity
and nondestructive
>
> -----Original Message-----
> From: landxml-bounce@xxxxxxxxxxxxx
> [mailto:landxml-bounce@xxxxxxxxxxxxx]On Behalf Of
Gergely Petrik
> Sent: Friday, October 28, 2005 4:45 AM
> To: landxml@xxxxxxxxxxxxx
> Subject: [LandXML] brkType required attribute
>
>
> Dear LandXML list members,
>
> I found that the Breakline element of the LandXML
schema has a required
> attribute, namely brkType, which seems to be
undefined (defined neither
> textually nor with a type). Could anyone help with a
definition or I should
> simply neglect it?
>
> Thanks,
> --
> Greg
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