VOFilter &

VOTable2XHTML

Chenzhou CUI, Yanxia ZHANG

China-VO Project

National Astronomical Observatory of China

IVOA InterOpOct2005 6-7 Oct 2005: Madrid

Two XSLT transforms

VOFilter• an XML filter for OpenOffice.org Calc to open VOTable f

iles• http://services.china-vo.org/vofilter/

VOTable2XHTML• a stylesheet to transform VOTable data into HTML/XHT

ML format• http://services.china-vo.org/votable2xhtml/

IVOA InterOpOct2005 6-7 Oct 2005: Madrid

OpenOffice.org 2• Lastest version: OpenOffice.org 2.0 Beta 2• OASIS OpenDocument XML format is used as the default file forma

t

OpenDocument• Open Document Format for Office Applications (OpenDocument) v

1.0 Specification has been approved as an OASIS Standard• 6 type of documents defined: text, drawing, presentation, spreadsh

eet, chart, image• The format will be adopted and supported by other applications and

organizations, for example, Koffice, StarOffice, European Commission, Massachusetts (US) and so on.

IVOA InterOpOct2005 6-7 Oct 2005: Madrid

VOFilter Transform Schema

<xsl:template name=“noschema” >

<office:automatic-styles>

<xsl:call-template name="votable_styles"/>

</office:automatic-styles>

<office:body>

<xsl:call-template name="data_import"/>

</office:body>

</xsl:template>

IVOA InterOpOct2005 6-7 Oct 2005: Madrid

<xsl:template name="data_import"><office:spreadsheet>

<!-- Transformation for each TABLE --><xsl:for-each select="//TABLE">

<xsl:call-template name="Ctable"/></xsl:for-each><!-- Transformation for each RESOURCE --><xsl:for-each select="//RESOURCE">

<xsl:call-template name="Cresource"/></xsl:for-each><!-- Transformation for the root VOTABLE --><xsl:for-each select="/VOTABLE">

<xsl:call-template name="VOTABLE"/></xsl:for-each>

</office:spreadsheet></xsl:template>

IVOA InterOpOct2005 6-7 Oct 2005: Madrid

<!-- "TABLEDATA" level transformation --><xsl:template name="Ctable">

<xsl:if test="//DATA/TABLEDATA"><xsl:call-template name="Ctabledata"/>

</xsl:if><xsl:if test=".//FIELD">

<xsl:call-template name="Ctablefield"/></xsl:if><xsl:if test=".//PARAM">

<xsl:call-template name="Ctableparam"/></xsl:if><xsl:if test=".//GROUP">

<xsl:call-template name="Ctablegroup"/></xsl:if><xsl:call-template name="Ctableother"/>

</xsl:template>

IVOA InterOpOct2005 6-7 Oct 2005: Madrid

<xsl:template name="Cresource"><xsl:call-template name="Cresourceparam"/><xsl:call-template name="Cresourceinfo"/><xsl:call-template name="Cresourceother"/>

</xsl:template><xsl:template name="VOTABLE">

<xsl:call-template name="VOTABLEparam"/><xsl:call-template name="VOTABLEinfo"/><xsl:call-template name="VOTABLEother"/>

</xsl:template>

IVOA InterOpOct2005 6-7 Oct 2005: Madrid

<xsl:template match="/"><xsl:choose>

<xsl:when test="namespace-uri()"><xsl:call-template name="withschem

a"/></xsl:when><xsl:otherwise>

<xsl:call-template name="noschema"/></xsl:otherwise>

</xsl:choose></xsl:template>

This parsing schema is general enough to be used in other transform applications

Namespace Problem

IVOA InterOpOct2005 6-7 Oct 2005: Madrid

Sheet Name Designation A VOTable file will be transformed into several sheets, sometime more

then ten, depending on the VOTable structure. Each sheet is designed a name using “ID” or “name” attribute of its originated ELEMENT. If neither “ID” or “name” is available, “TABLE”, “RESOURCE”, “VOTABLE” will be used.

TableData level• VOTID_RESID_TABID_TYPE: VOTABLE_yCat_2246_II_246_out_DA

TA RESORCE level

• VOTID_RESID_TYPE: VOTABLE_yCat_2246_Other VOTABLE level

• VOTID_TYPE: VOTABLE_INFO TYPE values include:

• DATA, FIELDS, INFO, PARAM, GROUP, Other

IVOA InterOpOct2005 6-7 Oct 2005: Madrid

Non-supported VOTable features

Only "TABLEDATA" data content is supported. "FITS" and "BINARY" serializations are NOT supported.

Not supported VOTable elements and attributes: • Recursive "RESOURCE" elements• Recursive "GROUP" elements• "VALUES" elements for "FIELD" and "PARAM" elements• All attributes except "href" of "LINK" elements• "encoding" attribute of "TD" elements

It is almost impossible to losslessly map 3-D tree XML file onto a 2-D plain spreadsheet.

IVOA InterOpOct2005 6-7 Oct 2005: Madrid

Some thoughts about Bruno Rino’s comments First, thank Bruno very much for his detailed test and report! A “bu

g”-fix version is under preparing. Selected comments:

• create a note (tooltip) for the "header" cells on the data spreadsheet Good Idea, “note” is supported by OpenDocument format. New version will support t

his.• Take advantage of the LINK element... create links on corresponding data cells

“LINK” is seldom used by VOTable creators, well-formed VOTables are not very common. We need think over about this feature.

Suggestion for VOTable creators: create well-formed VOTable data and files following the VOTable schema.

• Known numeric data shouldn't be loaded as text. “String” is the most accurate type, will not loss any precision. OpenOffice or Excel ha

s its own method to cope with numeric types, sometime the results are not you wanted. More suggestions are welcome on the issue......

• provide sample formulas and macros Is it out of the scope of the VOFilter? Speak frankly, I don’t understand well on how to use these functions in OpenOffice. I

will try when I have time. • LINK

http://ivoa.net/forum/votable/0509/0775.htm

IVOA InterOpOct2005 6-7 Oct 2005: Madrid

VOTable2XHTML

Same parsing engine used with VOFilter OpenDocument “ods” elements replaced with XHT

ML tags Two versions provided: standard and basic Basic output (data and fields) is enough for most u

se.

IVOA InterOpOct2005 6-7 Oct 2005: Madrid

References

OpenDocument 1.0• http://www.oasis-open.org/committees/tc_home.php?wg_abbrev=office

OpenOffice.org• http://www.openoffice.org/