# Composite Text Density

Hybrid Text DensityHybrid Text Density, Composite Text Density and Text Density are measures proposed in context of Noise Removal, Information Extraction. [mathjax] With the textual information, we propose two measures for the evaluation of the textual importance of tags in web pages: Text Density and Composite Text Density. Once an HTML document is parsed and represented by a DOM > tree, we..., Composite Text DensityHybrid Text Density, Composite Text Density and Text Density are measures proposed in context of Noise Removal, Information Extraction. [mathjax] With the textual information, we propose two measures for the evaluation of the textual importance of tags in web pages: Text Density and Composite Text Density. Once an HTML document is parsed and represented by a DOM > tree, we... and Text DensityHybrid Text Density, Composite Text Density and Text Density are measures proposed in context of Noise Removal, Information Extraction. [mathjax] With the textual information, we propose two measures for the evaluation of the textual importance of tags in web pages: Text Density and Composite Text Density. Once an HTML document is parsed and represented by a DOM > tree, we... are measures proposed in context of Noise Removal, Information Extraction.

With the textual information, we propose two measures for the evaluation of the textual importance of tags in web pages: Text DensityHybrid Text Density, Composite Text Density and Text Density are measures proposed in context of Noise Removal, Information Extraction. [mathjax] With the textual information, we propose two measures for the evaluation of the textual importance of tags in web pages: Text Density and Composite Text Density. Once an HTML document is parsed and represented by a DOM > tree, we... and Composite Text DensityHybrid Text Density, Composite Text Density and Text Density are measures proposed in context of Noise Removal, Information Extraction. [mathjax] With the textual information, we propose two measures for the evaluation of the textual importance of tags in web pages: Text Density and Composite Text Density. Once an HTML document is parsed and represented by a DOM > tree, we.... Once an HTML document is parsed and represented by a DOM > tree, we calculate the text densityHybrid Text Density, Composite Text Density and Text Density are measures proposed in context of Noise Removal, Information Extraction. [mathjax] With the textual information, we propose two measures for the evaluation of the textual importance of tags in web pages: Text Density and Composite Text Density. Once an HTML document is parsed and represented by a DOM > tree, we... for each node. Higher text densityHybrid Text Density, Composite Text Density and Text Density are measures proposed in context of Noise Removal, Information Extraction. [mathjax] With the textual information, we propose two measures for the evaluation of the textual importance of tags in web pages: Text Density and Composite Text Density. Once an HTML document is parsed and represented by a DOM > tree, we... implies the node is more likely to represent a tag with content text within the web page. In the case of noise, the opposite applies. Afterward, we > extend the Text DensityHybrid Text Density, Composite Text Density and Text Density are measures proposed in context of Noise Removal, Information Extraction. [mathjax] With the textual information, we propose two measures for the evaluation of the textual importance of tags in web pages: Text Density and Composite Text Density. Once an HTML document is parsed and represented by a DOM > tree, we... to the Composite Text DensityHybrid Text Density, Composite Text Density and Text Density are measures proposed in context of Noise Removal, Information Extraction. [mathjax] With the textual information, we propose two measures for the evaluation of the textual importance of tags in web pages: Text Density and Composite Text Density. Once an HTML document is parsed and represented by a DOM > tree, we... by adding statistical information about hyperlinks.

Song, D., Sun, F., & Liao, L. (2015). A hybrid approach for content extraction with text density and visual importance of DOM nodes, 75–96. http://doi.org/10.1007/s10115-013-0687-x

$$TD_i = \frac{C_i}{T_i}$$

where TDi is Text DensityHybrid Text Density, Composite Text Density and Text Density are measures proposed in context of Noise Removal, Information Extraction. [mathjax] With the textual information, we propose two measures for the evaluation of the textual importance of tags in web pages: Text Density and Composite Text Density. Once an HTML document is parsed and represented by a DOM > tree, we..., i is HTML tag, Ci is CharNumber, Ti is TagNumber

$$CTD_i = \frac{C_i}{T_i} \cdotp \log_{ln}$$

$$CTD_i = \frac { C_i T_i }$$

where TDi is Text DensityHybrid Text Density, Composite Text Density and Text Density are measures proposed in context of Noise Removal, Information Extraction. [mathjax] With the textual information, we propose two measures for the evaluation of the textual importance of tags in web pages: Text Density and Composite Text Density. Once an HTML document is parsed and represented by a DOM > tree, we..., i is HTML tag, Ci is CharNumber, Ti is TagNumber

Additional statictical information is used:

• LinkCharNumber  – number of all hyperlink characters in its subtree
• LinkTagNumbernumber of all hyperlink tags in its subtree – number of all hyperlink tags in its subtree

To combine textual and visual information for DOM nodes, the measure of visual important
is incorporated into the Composite Text DensityHybrid Text Density, Composite Text Density and Text Density are measures proposed in context of Noise Removal, Information Extraction. [mathjax] With the textual information, we propose two measures for the evaluation of the textual importance of tags in web pages: Text Density and Composite Text Density. Once an HTML document is parsed and represented by a DOM > tree, we..., redefined as Hybrid Text DensityHybrid Text Density, Composite Text Density and Text Density are measures proposed in context of Noise Removal, Information Extraction. [mathjax] With the textual information, we propose two measures for the evaluation of the textual importance of tags in web pages: Text Density and Composite Text Density. Once an HTML document is parsed and represented by a DOM > tree, we....
If i is a leaf node in the DOM tree, then its CharNumber (Ci ) is adjusted to Hybrid
CharNumber (HCi ) using the visual importanceVisual Importance value as a weight, as HCi = V Ii ∗ Ci .
For other tag nodes, the Hybrid CharNumber is defined as the sum of all its sons’ Hybrid
CharNumbers.

Definition 3.4 If i is a node in the DOM tree, then its Hybrid Text DensityHybrid Text Density, Composite Text Density and Text Density are measures proposed in context of Noise Removal, Information Extraction. [mathjax] With the textual information, we propose two measures for the evaluation of the textual importance of tags in web pages: Text Density and Composite Text Density. Once an HTML document is parsed and represented by a DOM > tree, we... (HT Di) is:

in which all the appearances of CharNumber in Eq. 2 are substituted by the Hybrid Char-
Number. Specifically, Ci and Cb for node i and the <body> tag are, respectively, changed
to HCi and HCb, while the remaining of Eq. 4 is exactly the same with Eq. 2.
It must be noticed that, previously in the definitions of Text DensityHybrid Text Density, Composite Text Density and Text Density are measures proposed in context of Noise Removal, Information Extraction. [mathjax] With the textual information, we propose two measures for the evaluation of the textual importance of tags in web pages: Text Density and Composite Text Density. Once an HTML document is parsed and represented by a DOM > tree, we... and Composite Text
Density, Ti is set to be 1 when it is 0. However, in the above definition of the Hybrid Text
Density, as the Visual ImportanceVisual Importance value V I is in the interval of [0, 1], the derived Hybrid
CharNumber is probably less than 1. To avoid the Hybrid Text DensityHybrid Text Density, Composite Text Density and Text Density are measures proposed in context of Noise Removal, Information Extraction. [mathjax] With the textual information, we propose two measures for the evaluation of the textual importance of tags in web pages: Text Density and Composite Text Density. Once an HTML document is parsed and represented by a DOM > tree, we... being negative, an
adaption is designed here: if Ti is 0, it is set to be HCi /Ci, where Ci and HCi are the initial
and the Hybrid CharNumbers, respectively.
With the Hybrid Text DensityHybrid Text Density, Composite Text Density and Text Density are measures proposed in context of Noise Removal, Information Extraction. [mathjax] With the textual information, we propose two measures for the evaluation of the textual importance of tags in web pages: Text Density and Composite Text Density. Once an HTML document is parsed and represented by a DOM > tree, we..., the resulted density histogram for the FT page is shown in
Fig. 6.
Unless otherwise specified, we use Text DensityHybrid Text Density, Composite Text Density and Text Density are measures proposed in context of Noise Removal, Information Extraction. [mathjax] With the textual information, we propose two measures for the evaluation of the textual importance of tags in web pages: Text Density and Composite Text Density. Once an HTML document is parsed and represented by a DOM > tree, we... to refer to the initial Text DensityHybrid Text Density, Composite Text Density and Text Density are measures proposed in context of Noise Removal, Information Extraction. [mathjax] With the textual information, we propose two measures for the evaluation of the textual importance of tags in web pages: Text Density and Composite Text Density. Once an HTML document is parsed and represented by a DOM > tree, we..., the
Composite Text DensityHybrid Text Density, Composite Text Density and Text Density are measures proposed in context of Noise Removal, Information Extraction. [mathjax] With the textual information, we propose two measures for the evaluation of the textual importance of tags in web pages: Text Density and Composite Text Density. Once an HTML document is parsed and represented by a DOM > tree, we... and the Hybrid Text DensityHybrid Text Density, Composite Text Density and Text Density are measures proposed in context of Noise Removal, Information Extraction. [mathjax] With the textual information, we propose two measures for the evaluation of the textual importance of tags in web pages: Text Density and Composite Text Density. Once an HTML document is parsed and represented by a DOM > tree, we.... And these calculation methods are
discussed further in Sect. 4