I Hate XML

1
I Hate XML
2
XML...

• has the optimal syntax it compresses perfectly
• is much hyped, so must be excellent
• is well supported in Java, so available to
  anyone!... and Perl support?
• is used everywhere (help!)

3
XML...

• has a complicated content describing formalism,
  described in schema's
• is easily extensible
• XML its noting more than Yet Another
  Syntax!!!!with an optional formalism

4
Need
Validating translation
XML
HASH

• validating
• complete
• simple
• fast

Schema / WSDL file
5
Need
Validating translation
HASH
XML

• validating
• complete
• simple
• fast

Schema / WSDL file
6
Many (unmaintained) XML modules

• Translate HASH to XML (and/or back) by
• None complete, usually slow they just DWIM

7
Examples

• simpleType

ltanswergt42lt/answergt answer gt 42
8
Examples

• complexType and complexType/complexContent

ltzoo nameBurgers Zoogt ltlocationgtArnhemlt/loca
tiongt ltanimalgtmonkeylt/animalgt
ltanimalgtdonkeylt/animalgt lt/zoogt zoo gt name
gt 'Burgers Zoo' , location gt
'Arnhem' , animal gt 'monkey',
'donkey'
9
Examples

• complexType/simpleContent

ltprice currencyeurogt300lt/pricegt price gt
currency gt 'euro' , _
gt 300
10
Why another?

• No run-time xpath searches need for speed!
• int should not become 1.9999, but long long 2
• Integer is BigInt must support minimal 18
  digits- 121 21 363462 32461532 1
• support for list, union, subtitutionGroup
• Real qualified/unqualified name-space support

11
Examples

• create a reader XML to HASH
• create a writer HASH to XML
• based on XMLLibXML

my rules XMLCompileSchema-gtnew(xml_string
) my read rules-gtcompile(READER gt
'mytype') my hash read-gt(xml) my
doc XMLLibXMLDocument-gtnew('1.0',
'UTF-8') my write rules-gtcompile(WRITER gt
'mytype') my xml write-gt(doc, hash)
12
Complete?

• No, but...
• many optimizations are implemented
• needs real-life testing
• W3C TRs are unreadable
• only newest schema spec, prepared to extend.

13
Future

• WSDL
• SOAP
• CPAN6

14
I Love YAML (Syck, SOX, SLiP)
?
?
15
What is the expected structure? Is it
documented? Can it be checked?
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XML to YAML
XML
HASH
YAML
Schema
17
YAML validation
XML
HASH
YAML
Schema
18
YAML schema's
XML
HASH
YAML
XML
HASH
YAML
Schema
19
I Hate XML
I Love YAML
20
I Hate XML
It's just syntax!!!!
I Love YAML
21
It's just syntax!!!!
The real problem is design the data-structure in
a way that it can last for a very long time AND
DOCUMENT THAT