[XML-SIG] Python DOM Unification -- level

[Mike Olson]

This is a cryptographically signed message in MIME format.

--------------msC31DF1719CA3CA2D111E3B60
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit


I would say at the Builder Level, but handle it differently then you suggest.

if sys.argv[1] == '4th' :
    fac = 4dom.Ext.Factory
    builder = 4dom.Ext.Builder
elif sys.argv[1] == 'pydom':
    fac = pydom.factory
    builder = pydom.builder
else
    fac = minidom.fac
    builder = minidom.builder

doc = fac.CreateDocument();
doc = builder.XMLFromURL('www.fourthought.com')


where the factory interface defines everything that is not creatable from a
document.

interface DOMFactory {

    Document CreateDocument();
    HTMLDocument CreateHTMLDocument();
    DocType CreateDocType();
    NodeList CreateNodeList(in sequence<Node>);
    ...
};

and builder defines an interface for creating documents from different
streams

interface DOMBuilder {

    Document FromXMLFile(in string URL);
    HTMLDocument FromHTMLFile(in string URL);
    Document FromXMLString(in string XML);
    ...
};


Mike

Paul Prescod wrote:

> Following are some meta-questions on the proposed Python DOM unification.
>
> First, what is the appropriate level of unification?
>
>  * Module level:
>
> if sys.argv[1]=="fast":
>     from xml import minidom
>     dom = minidom
> else if sys.argv[1]=="complete":
>     from xml import dom
> else if sys.argv[1]=="distributed":
>     from 4thought import dom
>
>  * Builder level:
>
> if sys.argv[1]=="4thought":
>     from 4thought.dom import sax_builder()
> else:
>    from xml.dom import sax_builder()
>
> xml.dom.FromXML( sax_builder() )
>
>  * Document level:
>
> if sys.argv[1]=="4thought":
>     4thought.dom.Gimme.a.document()
> else:
>     xml.dom.I.need.a.document()
>
> document.doStuff()
>
> My preference is for "Builder level", I think. Portable helper functions
> could go into a universal xml.dom package instead of into each package.
>
> --
>  Paul Prescod  - ISOGEN Consulting Engineer speaking for only himself
>  http://itrc.uwaterloo.ca/~papresco
>
> Company spokeswoman Lana Simon stressed that Interactive
> Yoda is not a Furby. Well, not exactly.
>
> "This is an interactive toy that utilizes Furby technology,"
> Simon said. "It will react to its surroundings and will talk."
>   - http://www.wired.com/news/news/culture/story/19222.html
>
> _______________________________________________
> XML-SIG maillist  -  XML-SIG@python.org
> http://www.python.org/mailman/listinfo/xml-sig

--
Mike Olson
Member Consultant
FourThought LLC
http://www.fourthought.com http://opentechnology.org


---

"No program is interesting in itself to a programmer. It's only interesting
as long
as there are new challenges and new ideas coming up." --- Linus Torvalds


--------------msC31DF1719CA3CA2D111E3B60
Content-Type: application/x-pkcs7-signature; name="smime.p7s"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="smime.p7s"
Content-Description: S/MIME Cryptographic Signature

MIIKmQYJKoZIhvcNAQcCoIIKijCCCoYCAQExCzAJBgUrDgMCGgUAMAsGCSqGSIb3DQEHAaCC
CCUwggTvMIIEWKADAgECAhAOCY8cYeSQOObs5zKyDmWRMA0GCSqGSIb3DQEBBAUAMIHMMRcw
FQYDVQQKEw5WZXJpU2lnbiwgSW5jLjEfMB0GA1UECxMWVmVyaVNpZ24gVHJ1c3QgTmV0d29y
azFGMEQGA1UECxM9d3d3LnZlcmlzaWduLmNvbS9yZXBvc2l0b3J5L1JQQSBJbmNvcnAuIEJ5
IFJlZi4sTElBQi5MVEQoYyk5ODFIMEYGA1UEAxM/VmVyaVNpZ24gQ2xhc3MgMSBDQSBJbmRp
dmlkdWFsIFN1YnNjcmliZXItUGVyc29uYSBOb3QgVmFsaWRhdGVkMB4XDTk5MDMwNTAwMDAw
MFoXDTk5MDUwNDIzNTk1OVowggEKMRcwFQYDVQQKEw5WZXJpU2lnbiwgSW5jLjEfMB0GA1UE
CxMWVmVyaVNpZ24gVHJ1c3QgTmV0d29yazFGMEQGA1UECxM9d3d3LnZlcmlzaWduLmNvbS9y
ZXBvc2l0b3J5L1JQQSBJbmNvcnAuIGJ5IFJlZi4sTElBQi5MVEQoYyk5ODEeMBwGA1UECxMV
UGVyc29uYSBOb3QgVmFsaWRhdGVkMSYwJAYDVQQLEx1EaWdpdGFsIElEIENsYXNzIDEgLSBO
ZXRzY2FwZTETMBEGA1UEAxQKTWlrZSBPbHNvbjEpMCcGCSqGSIb3DQEJARYabWlrZS5vbHNv
bkBmb3VydGhvdWdodC5jb20wgZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJAoGBANKGswZUnQ/B
IfNlZWIIy6G6AkyjYgPRhXynebPtI5ARMq9xDo2zgLgWE+8QffdoZp2hUnTpm63B6cG8yqH1
PnA/7SB2roIfml1vnOwXgNuBctciTmnrac4GWgL0CM9839fJZh47QIVYPlCbOPtnvnH1NGGD
jFWAVX7vmES72Dl9AgMBAAGjggGPMIIBizAJBgNVHRMEAjAAMIGsBgNVHSAEgaQwgaEwgZ4G
C2CGSAGG+EUBBwEBMIGOMCgGCCsGAQUFBwIBFhxodHRwczovL3d3dy52ZXJpc2lnbi5jb20v
Q1BTMGIGCCsGAQUFBwICMFYwFRYOVmVyaVNpZ24sIEluYy4wAwIBARo9VmVyaVNpZ24ncyBD
UFMgaW5jb3JwLiBieSByZWZlcmVuY2UgbGlhYi4gbHRkLiAoYyk5NyBWZXJpU2lnbjARBglg
hkgBhvhCAQEEBAMCB4AwgYYGCmCGSAGG+EUBBgMEeBZ2ZDQ2NTJiZDYzZjIwNDcwMjkyOTg3
NjNjOWQyZjI3NTA2OWM3MzU5YmVkMWIwNTlkYTc1YmM0YmM5NzAxNzQ3ZGE1ZDNmMjE0MWJl
YWRiMmJkMmU4OTIxM2FlNmFmOWRmMTE0OTk5YTNiODQ1ZjlmM2VhNDUwYzAzBgNVHR8ELDAq
MCigJqAkhiJodHRwOi8vY3JsLnZlcmlzaWduLmNvbS9jbGFzczEuY3JsMA0GCSqGSIb3DQEB
BAUAA4GBAIuxBeIOBMHbj5yM/Vu4UJxDcz4Xtc7h0K8c6d82SiwwKLN5Gbew69PevcN6Ak+p
D8LO4NyCH8Cfu3acoT0Efi99XjWvdi2eSbDJUw6MvgJtnAfY03zM+Cf31A/1iyrvr3hD45/c
yhUNRh8f6qX1NzeKvvh5AcYD1bsi+0wnP0D8MIIDLjCCApegAwIBAgIRANJ2Lo0UDD19sqgl
Xa/uDXUwDQYJKoZIhvcNAQECBQAwXzELMAkGA1UEBhMCVVMxFzAVBgNVBAoTDlZlcmlTaWdu
LCBJbmMuMTcwNQYDVQQLEy5DbGFzcyAxIFB1YmxpYyBQcmltYXJ5IENlcnRpZmljYXRpb24g
QXV0aG9yaXR5MB4XDTk4MDUxMjAwMDAwMFoXDTA4MDUxMjIzNTk1OVowgcwxFzAVBgNVBAoT
DlZlcmlTaWduLCBJbmMuMR8wHQYDVQQLExZWZXJpU2lnbiBUcnVzdCBOZXR3b3JrMUYwRAYD
VQQLEz13d3cudmVyaXNpZ24uY29tL3JlcG9zaXRvcnkvUlBBIEluY29ycC4gQnkgUmVmLixM
SUFCLkxURChjKTk4MUgwRgYDVQQDEz9WZXJpU2lnbiBDbGFzcyAxIENBIEluZGl2aWR1YWwg
U3Vic2NyaWJlci1QZXJzb25hIE5vdCBWYWxpZGF0ZWQwgZ8wDQYJKoZIhvcNAQEBBQADgY0A
MIGJAoGBALtaRIoEFrtV/QN6ii2UTxV4NrgNSrJvnFS/vOh3Kp258Gi7ldkxQXB6gUu5SBNW
LccI4YRCq8CikqtEXKpC8IIOAukv+8I7u77JJwpdtrA2QjO1blSIT4dKvxna+RXoD4e2HOPM
xpqOf2okkuP84GW6p7F+78nbN2rISsgJBuSZAgMBAAGjfDB6MBEGCWCGSAGG+EIBAQQEAwIB
BjBHBgNVHSAEQDA+MDwGC2CGSAGG+EUBBwEBMC0wKwYIKwYBBQUHAgEWH3d3dy52ZXJpc2ln
bi5jb20vcmVwb3NpdG9yeS9SUEEwDwYDVR0TBAgwBgEB/wIBADALBgNVHQ8EBAMCAQYwDQYJ
KoZIhvcNAQECBQADgYEAiLg3O93alDcAraqf4YEBcR6Sam0v9vGd08pkONwbmAwHhluFFWoP
uUmFpJXxF31ntH8tLN2aQp7DPrSOquULBt7yVir6M8e+GddTTMO9yOMXtaRJQmPswqYXD11Y
Gkk8kFxVo2UgAP0YIOVfgqaxqJLFWGrBjQM868PNBaKQrm4xggI8MIICOAIBATCB4TCBzDEX
MBUGA1UEChMOVmVyaVNpZ24sIEluYy4xHzAdBgNVBAsTFlZlcmlTaWduIFRydXN0IE5ldHdv
cmsxRjBEBgNVBAsTPXd3dy52ZXJpc2lnbi5jb20vcmVwb3NpdG9yeS9SUEEgSW5jb3JwLiBC
eSBSZWYuLExJQUIuTFREKGMpOTgxSDBGBgNVBAMTP1ZlcmlTaWduIENsYXNzIDEgQ0EgSW5k
aXZpZHVhbCBTdWJzY3JpYmVyLVBlcnNvbmEgTm90IFZhbGlkYXRlZAIQDgmPHGHkkDjm7Ocy
sg5lkTAJBgUrDgMCGgUAoIGxMBgGCSqGSIb3DQEJAzELBgkqhkiG9w0BBwEwHAYJKoZIhvcN
AQkFMQ8XDTk5MDQyNjIzNTYxMlowIwYJKoZIhvcNAQkEMRYEFKZtvLPMBvW6c58NCO22YlMa
n7dPMFIGCSqGSIb3DQEJDzFFMEMwCgYIKoZIhvcNAwcwDgYIKoZIhvcNAwICAgCAMAcGBSsO
AwIHMA0GCCqGSIb3DQMCAgFAMA0GCCqGSIb3DQMCAgEoMA0GCSqGSIb3DQEBAQUABIGAKvEI
6APY8OxYoevk4dGtnj/Kgwn7NzADyvgm56WjIWYDmQbGGJQlrH75Cbi5uUeCcP1vp1kyEs3+
SskBHi9/pPa/fQxiaLzb+166W2fbwne6pu1cbAiM86Svp8YuKDiYDMEbtbjQDlWYJXrjc+19
cAKREOcbyiGxQEV/7cGrA/Q=
--------------msC31DF1719CA3CA2D111E3B60--