d:swarm uses functions of the Metamorph framework for data transformation. More detailed information about these functions you can find at https://github.com/culturegraph/metafacture-core/wiki/Metamorph-functions.
| Transformation | Description | Parameter | Explanation | Example |
|---|---|---|---|---|
| case | Letter characters are transformed to lower or upper case. | language | locale | en (for English) |
| upper | lower case is converted to upper case | SLUB DRESDEN | ||
| lower | upper case is converted to lower case | slub desden | ||
| compose | Wraps the value in a prefix and postfix. Prefixing a mapping value “swarm” with “d:” will result in “d:swarm”. | prefix | prefix string | |
| postfix | postfix string | d: | ||
| concat |
Combines the values of several attributes into one element, adding option prefix and postfix strings, and passes result to output.
Value 1: “SLUB” Value 2: “Dresden” delimiter: “-” prefix: “Pre” postfix: “Post” Result: “PreSLUB-DresdenPost” |
delimiter | delimiter used to separate concatenated values | |
| prefix | prefix string | |||
| postfix | postfix string | |||
| constant | Replaces the value with a constant string. | value | replace value | |
| count | Counts occurrences of an attribute and passes result to output. | no parameter | ||
| equals | Filtering based on equality of the inpupt attribute and the function parameter. If the same, the input attribute is passed to output. | string | comparison value | |
| htmlanchor |
Creates an HTML anchor tag with the following pattern:
titleHomepage SLUB Dresden |
prefix | prefix string | http://www. |
| postfix | postfix string | .de | ||
| title | link text | Homepage SLUB Dresden | ||
| isbn | ISBN cleaning, checkdigit verication and transformation between ISBN 10 and ISBN 13. Non-digit characters can be eliminated. ISBN can be validated. | isbn13 | transformation to ISBN 13 | |
| isbn10 | transformation to ISBN 10 | |||
| clean | elimination of non-digit characters | |||
| verifyCheckDigit | validation | |||
| normalize-utf8 | UTF-8 normalization. Transforms umlauts into canonical form. | no parameter | ||
| not-equals | Filtering based on inequality. If unequal, attribute value is passed to putput. | string | comparison value | |
| occurence |
Filtering based on occurrence.
Values to be mapped (e.g. result of split): “SLUB” “Dresden” “d:swarm” “Datenmanagement” only: “moreThen 2” sameEntity: “True” Result: “d:swarm” “Datenmanagement” |
only | Position of element |
moreThen 2
3 lessThen |
| sameEntity |
True
False |
|||
| regexp | Regexp matching returning the first occurrence of a pattern. The pattern is a Java regex pattern. | format | order of the capturing groups | ${1} |
| match | regex pattern | ^isbn\d\d\-(\d{10,13}) | ||
| replace | Replaces a pattern with a string. The pattern is a Java regex pattern. | pattern | regex pattern | ^isbn\d\d\-(\d{10,13}) |
| with | replace value | |||
| split |
Splitting based on a regexp.
Value to be split: “SLUB-Dresden” delimiter: “-” Result: “SLUB” and “Dresden” are passed to output |
delimiter | regex pattern | |
| substring |
Extracts a substring.
value: “SLUB Dresden” start=0, end=7, returns “SLUB Dr” |
end | index position of the last character | |
| start | index position of the first characte | |||
| trim | Trims all white spaces at the beginning and at the end of the attribute value. | no parameter | ||
| urlencode | Transforms all characters not allowed in a URL into URL-compatible characters. | no parameter | ||
Step by Step:
| ← Design and Execute Transformations ← Define Filters |
Graph Data Model → |